Global warming and a tournament in college football--in both cases, a person can expect to get roasted if they oppose the popular consensus. Our understanding of global warming (both its effects and the potential solutions) is built largely on myths. This is, unfortunately, also the case with a tournament in college football. A tournament would not magically identify the best team in college football and it would bring with it serious baggage. I'll here try to explain how I see the issue and convince you that the topic deserves real debate.
I think I can summarize the arguments for a tournament in college football in two categories: 1) the current system does not necessarily identify the best team in the country and 2) the current system is anti-climatic. I'll take these on one at a time.
Does the current system identify the best team in the country? No. It's not supposed to, its supposed to identify the national champion--an ill-defined concept that breeds disagreement and debate. The reason we cannot agree on a national champion in college football is not that the BCS is flawed but that no one knows what it means to be a national champion in college football. In college basketball or college baseball or any other significant sport, the champion is the winner of a tournament. Its a definition, not a theological truth that was spawned during the creation of sport.
Before the BCS, the national champion in college football could be defined literally as the highest ranked team and substantively as the team that was able to accumulate the most quality wins while losing as rarely as possible. Now, the substantive definition is similar but the literal definition under the BCS is a bit more convoluted--it is the team that receives the most points after a summation of various polls. Because the substantive definition uses two variables (quality wins and losses) and because the quality of a win falls on a fuzzy continuum, the application of this definition is subjective--how good are particular wins and how damning are particular losses?
If you remember nothing else, though, remember that never in college football nor at any time in any sport that I can think of is the champion the "best team". One reason is that we don't really care about the best team, but the team that has performed at the highest level. Those are different things.
But then try to define which team performed at the highest level. As the trend-o-matic demonstrates, a team's performance varies across a season. Do we find the team that has had the highest average performance, the team that has had the highest minimum, or the team that achieved the highest level at any particular time in a season? If you want a tournament, you're taking option three since the tournament can only identify the best team at the very end of the season without giving us any perspective on the team's relative performance through the season.
How often were the Giants better than the Patriots during the 2007-2008 season? Only during the Super Bowl; from September until kickoff, the Patriots were significantly better. But because the Giants had three hours during which they outperformed the Patriots, the Giants were crowned as the champions of the NFL. That, to me, is a weak definition of a champion and one that college football can avoid.
Which leads to the next issue--even if we are to place too much weight on a team's performance at the very end of the season for naming a champion, a tournament will often fail to identify which team is performing at the highest level. I discuss this more fully here, but the crux of the matter is that a team's performance, because of natural fluctuations in the players', coaches', and referees' biologies, luck, and other random events, will vary from game to game and moment to moment. Consequently, the more teams we send to the tournament, the more games teams have to win, and the less likely it is that the best team will get spit out at the end.
And any tournament in college football, in time, will expand.
2) The BCS bowl system is anti-climatic. I agree completely with that concern, but the solution is not a tournament. Ohio State had to wait almost 50 days from beating Michigan to playing LSU. I assume OSU fans stayed interested, but I had moved on to other interests (NFL, NBA, NHL, etc., there were plenty of options). Even the two weeks for the Super Bowl is too long in my opinion, but the wait for bowls in college football is ridiculous. And playing at neutral locations far from either team is a second problem (though USC and LSU have had quasi-home national championship games and that shouldn't happen either).
College football should have post-season games that run up against the most exciting regular season in sports--and why is it the most exciting regular season in sports? Because it doesn't end in a massive tournament that invites Oral Roberts and American University (or even Fresno State).
But moving up bowl games is the only change I can propose. I don't want a tournament-defined national champion in college football because that will strip some of the importance of week 1 and will make college football like everyone else. I stand behind a "highest average performance" definition, but without a complete round robin so every team gets a chance to play the rest, such a definition is inherently subjective. I could write my own algorithm to identify the team with the highest average performance, but it will only be my opinion--there is no law in heaven that defines what it means to be a national champion in college football.
Addendum: If we did have a tournament, it can admit only conference champions. One very nice consequence would be that non-conference games would not affect a teams chances at winning a national championship. Consequently, teams would bulk up their non-conference schedule for the experience and cash--but remember, college basketball also started with a tournament that allowed only conference champions and now people are pushing to extend it from a field of 65 to 96. Don't play with fire.
BPR | A system for ranking teams based only one wins and losses and strength of schedule. See BPR for an explanation. |
EPA (Expected Points Added) | Expected points are the points a team can "expect" to score based on the distance to the end zone and down and distance needed for a first down, with an adjustment for the amount of time remaining in some situations. Expected points for every situation is estimated using seven years of historical data. The expected points considers both the average points the offense scores in each scenario and the average number of points the other team scores on their ensuing possession. The Expected Points Added is the change in expected points before and after a play. |
EP3 (Effective Points Per Possession) | Effective Points Per Possession is based on the same logic as the EPA, except it focuses on the expected points added at the beginning and end of an offensive drive. In other words, the EP3 for a single drive is equal to the sum of the expected points added for every offensive play in a drive (EP3 does not include punts and field goal attempts). We can also think of the EP3 as points scored+expected points from a field goal+the value of field position change on the opponent's next possession. |
Adjusted for Competition | We attempt to adjust some statistics to compensate for differences in strength of schedule. While the exact approach varies some from stat to stat the basic concept is the same. We use an algorithm to estimate scores for all teams on both sides of the ball (e.g., offense and defense) that best predict real results. For example, we give every team an offensive and defensive yards per carry score. Subtracting the offensive score from the defensive score for two opposing teams will estimate the yards per carry if the two teams were to play. Generally, the defensive scores average to zero while offensive scores average to the national average, e.g., yards per carry, so we call the offensive score "adjusted for competition" and roughly reflects what the team would do against average competition |
Impact | see Adjusted for Competition. Impact scores are generally used to evaluate defenses. The value roughly reflects how much better or worse a team can expect to do against this opponent than against the average opponent. |
[-] About this table
Includes the
top 180 QBs by total plays
Total <=0 | Percent of plays that are negative or no gain |
Total >=10 | Percent of plays that gain 10 or more yards |
Total >=25 | Percent of plays that gain 25 or more yards |
10 to 0 | Ratio of Total >=10 to Total <=0 |
Includes the
top 240 RBs by total plays
Total <=0 | Percent of plays that are negative or no gain |
Total >=10 | Percent of plays that gain 10 or more yards |
Total >=25 | Percent of plays that gain 25 or more yards |
10 to 0 | Ratio of Total >=10 to Total <=0 |
Includes the
top 300 Receivers by total plays
Total <=0 | Percent of plays that are negative or no gain |
Total >=10 | Percent of plays that gain 10 or more yards |
Total >=25 | Percent of plays that gain 25 or more yards |
10 to 0 | Ratio of Total >=10 to Total <=0 |
Includes
the
top 180 players by pass attempts)
3rdLComp% |
Completion % on 3rd and long (7+
yards) |
SitComp% |
Standardized completion % for
down and distance. Completion % by down and distance are weighted by
the national average of pass plays by down and distance. |
Pass <=0 | Percent of pass plays that are negative or no gain |
Pass >=10 | Percent of pass plays that gain 10 or more yards |
Pass >=25 | Percent of pass plays that gain 25 or more yards |
10 to 0 | Ratio of Pass >=10 to Pass<=0 |
%Sacks |
Ratio of sacks to pass plays |
Bad INTs |
Interceptions on 1st or 2nd down
early before the last minute of the half |
Includes the top 240 players by carries
YPC1stD |
Yards per carry on 1st down |
CPCs |
Conversions (1st down/TD) per
carry in short yardage situations - the team 3 or fewer yards for a 1st
down or touchdown |
%Team Run |
Player's carries as a percent of team's carries |
%Team RunS |
Player's carries as a percent of team's carries in short
yardage situations |
Run <=0 |
Percent of running plays that
are negative or no gain |
Run >=10 |
Percent of running plays that
gain 10 or more yards |
Run >=25 | Percent of running plays that gain 25 or more yards |
10 to 0 | Ratio of Run >=10 to Run <=0 |
Includes the top 300 players by targets
Conv/T 3rd | Conversions per target on 3rd Downs |
Conv/T PZ | Touchdowns per target inside the 10 yardline |
%Team PZ | Percent of team's targets inside the 10 yardline |
Rec <=0 | Percent of targets that go for negative yards or no net gain |
Rec >=10 | Percent of targets that go for 10+ yards |
Rec >=25 | Percent of targets that go for 25+ yards |
10 to 0 | Ratio of Rec>=0 to Rec<=0 |
Includes the top 300 players by targets
xxxx | xxxx |
...
Includes players with a significant number of attempts
NEPA | "Net Expected Points Added": (expected points after play - expected points before play)-(opponent's expected points after play - opponent's expected points before play). Uses the expected points for the current possession and the opponent's next possession based on down, distance and spot |
NEPA/PP | Average NEPA per play |
Max/Min | Single game high and low |
Includes players with a significant number of attempts
NEPA | "Net Expected Points Added": (expected points after play - expected points before play)-(opponent's expected points after play - opponent's expected points before play). Uses the expected points for the current possession and the opponent's next possession based on down, distance and spot |
NEPA/PP | Average NEPA per play |
Max/Min | Single game high and low |
Adjusted | Reports the per game EPA adjusted for the strength of schedule. |
Defensive Possession Stats
Points/Poss | Offensive points per possession |
EP3 | Effective Points per Possession |
EP3+ | Effective Points per Possession impact |
Plays/Poss | Plays per possession |
Yards/Poss | Yards per possession |
Start Spot | Average starting field position |
Time of Poss | Average time of possession (in seconds) |
TD/Poss | Touchdowns per possession |
TO/Poss | Turnovers per possession |
FGA/Poss | Attempted field goals per possession |
%RZ | Red zone trips per possession |
Points/RZ | Average points per red zone trip. Field Goals are included using expected points, not actual points. |
TD/RZ | Touchdowns per red zone trip |
FGA/RZ | Field goal attempt per red zone trip |
Downs/RZ | Turnover on downs per red zone trip |
Defensive Play-by-Play Stats
EPA/Pass | Expected Points Added per pass attempt |
EPA/Rush | Expected Points Added per rush attempt |
EPA/Pass+ | Expected Points Added per pass attempt impact |
EPA/Rush+ | Expected Points Added per rush attempt impact |
Yards/Pass | Yards per pass |
Yards/Rush | Yards per rush |
Yards/Pass+ | Yards per pass impact |
Yards/Rush+ | Yards per rush impact |
Exp/Pass | Explosive plays (25+ yards) per pass |
Exp/Rush | Explosive plays (25+ yards) per rush |
Exp/Pass+ | Explosive plays (25+ yards) per pass impact |
Exp/Rush+ | Explosive plays (25+ yards) per rush impact |
Comp% | Completion percentage |
Comp%+ | Completion percentage impact |
Yards/Comp | Yards per completion |
Sack/Pass | Sacks per pass |
Sack/Pass+ | Sacks per pass impact |
Sack/Pass* | Sacks per pass on passing downs |
INT/Pass | Interceptions per pass |
Neg/Rush | Negative plays (<=0) per rush |
Neg/Run+ | Negative plays (<=0) per rush impact |
Run Short | % Runs in short yardage situations |
Convert% | 3rd/4th down conversions |
Conv%* | 3rd/4th down conversions versus average by distance |
Conv%+ | 3rd/4th down conversions versus average by distance impact |
Offensive Play-by-Play Stats
Plays | Number of offensive plays |
%Pass | Percent pass plays |
EPA/Pass | Expected Points Added per pass attempt |
EPA/Rush | Expected Points Added per rush attempt |
EPA/Pass+ | Expected Points Added per pass attempt adjusted for competition |
EPA/Rush+ | Expected Points Added per rush attempt adjusted for competition |
Yards/Pass | Yards per pass |
Yards/Rush | Yards per rush |
Yards/Pass+ | Yards per pass adjusted for competition |
Yards/Rush+ | Yards per rush adjusted for competition |
Exp Pass | Explosive plays (25+ yards) per pass |
Exp Run | Explosive plays (25+ yards) per rush |
Exp Pass+ | Explosive plays (25+ yards) per pass adjusted for competition |
Exp Run+ | Explosive plays (25+ yards) per rush adjusted for competition |
Comp% | Completion percentage |
Comp%+ | Completion percentage adjusted for competition |
Sack/Pass | Sacks per pass |
Sack/Pass+ | Sacks per pass adjusted for competition |
Sack/Pass* | Sacks per pass on passing downs |
Int/Pass | Interceptions per pass |
Neg/Run | Negative plays (<=0) per rush |
Neg/Run+ | Negative plays (<=0) per rush adjusted for competition |
Run Short | % Runs in short yardage situations |
Convert% | 3rd/4th down conversions |
Conv%* | 3rd/4th down conversions versus average by distance |
Conv%+ | 3rd/4th down conversions versus average by distance adjusted for competition |
Offensive Possession Stats
Points/Poss | Offensive points per possession |
EP3 | Effective Points per Possession |
EP3+ | Effective Points per Possession adjusted for competition |
Plays/Poss | Plays per possession |
Yards/Poss | Yards per possession |
Start Spot | Average starting field position |
Time of Poss | Average time of possession (in seconds) |
TD/Poss | Touchdowns per possession |
TO/Poss | Turnovers per possession |
FGA/Poss | Attempted field goals per possession |
Poss/Game | Possessions per game |
%RZ | Red zone trips per possession |
Points/RZ | Average points per red zone trip. Field Goals are included using expected points, not actual points. |
TD/RZ | Touchdowns per red zone trip |
FGA/RZ | Field goal attempt per red zone trip |
Downs/RZ | Turnover on downs per red zone trip |
PPP | Points per Possession |
aPPP | Points per Possession allowed |
PPE | Points per Exchange (PPP-aPPP) |
EP3+ | Expected Points per Possession |
aEP3+ | Expected Points per Possession allowed |
EP2E+ | Expected Points per Exchange |
EPA/Pass+ | Expected Points Added per Pass |
EPA/Rush+ | Expected Points Added per Rush |
aEPA/Pass+ | Expected Points Allowed per Pass |
aEPA/Rush+ | Expected Points Allowed per Rush |
Exp/Pass | Explosive Plays per Pass |
Exp/Rush | Explosive Plays per Rush |
aExp/Pass | Explosive Plays per Pass allowed |
aExp/Rush | Explosive Plays per Rush allowed |
BPR | A method for ranking conferences based only on their wins and losses and the strength of schedule. See BPR for an explanation. |
Power | A composite measure that is the best predictor of future game outcomes, averaged across all teams in the conference |
P-Top | The power ranking of the top teams in the conference |
P-Mid | The power ranking of the middling teams in the conference |
P-Bot | The power ranking of the worst teams in the conference |
SOS-Und | Strength of Schedule - Undefeated. Focuses on the difficulty of going undefeated, averaged across teams in the conference |
SOS-BE | Strength of Schedule - Bowl Eligible. Focuses on the difficulty of becoming bowl eligible, averaged across teams in the conference |
Hybrid | A composite measure that quantifies human polls, applied to converences |
Player Game Log
Use the yellow, red and green cells to filter values. Yellow cells filter for exact matches, green cells for greater values and red cells for lesser values. By default, the table is filtered to only the top 200 defense-independent performances (oEPA). The table includes the 5,000 most important performances (positive and negative) by EPA.
Use the yellow, red and green cells to filter values. Yellow cells filter for exact matches, green cells for greater values and red cells for lesser values. By default, the table is filtered to only the top 200 defense-independent performances (oEPA). The table includes the 5,000 most important performances (positive and negative) by EPA.
EPA | Expected points added (see glossary) |
oEPA | Defense-independent performance |
Team Game Log
Use the yellow, red and green cells to filter values. Yellow cells filter for exact matches, green cells for greater values and red cells for lesser values.
Use the yellow, red and green cells to filter values. Yellow cells filter for exact matches, green cells for greater values and red cells for lesser values.
EP3 | Effective points per possession (see glossary) |
oEP3 | Defense-independent offensive performance |
dEP3 | Offense-independent defensive performance |
EPA | Expected points added (see glossary) |
oEPA | Defense-independent offensive performance |
dEPA | Offense-independent defensive performance |
EPAp | Expected points added per play |
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I have got to have my plus one system. At least give me that. :-)
ReplyDeleteIts a definition, not a theological truth that was spawned during the creation of sport.
ReplyDeleteGreat quote. So true.
If you remember nothing else, though, remember that never in college football nor at any time in any sport that I can think of is the champion the "best team".
Gosh, I have been saying the same thing for a few years now. I seriously think people do not understand the difference between "champion" and "best team."
I have sworn to myself not to argue this year with people who want a playoff. :-)
you are one of the biggest idiots i have ever heard of. the ONLY way to get a champion is to play the best. i could think of at least 3 scenarios to determine a true national champ. its always one of the best teams in any sport that ends up winning. of COURSE they have to string together 3 or 4 wins and have everything fall into place. all good teams have a certain amount of luck go their way. all part of it.
ReplyDeleteI completely agree with the last comment. College football needs a tournament, it's the only way to determine the "best" team in the end. The regular season is when you develop your team. Therefore, your seed in the tournament is based off of your regular season performance. No one cares how good the team "used to be" back in week one, I care how good they are now.
ReplyDeleteScott - I like your site. In another spot, I would like to propose some analysis for you to consider. I disagree with your position on a playoff. The principle concern I have, and I think you'll appreciate this given your inclination to statistical analysis, is that there is very little correlation between conferences. In fact, I would argue the correlation is so small that there is no real way to compare how good team A from conf. 1 is relative to team B from conf. 2. There just isn't enough data. I'm interested to hear your argument opposing this. If you accept this, then the only way to have a sense of who the "best" is, is to play it on the field. Is a one game scenario ideal, no. But we make this same analysis during the regular season and award conference championships based on this very principle.
ReplyDeleteCheers- Steve Bayer
Scott,
ReplyDeleteYour argument is well stated.
Another point of the randomness of the playoff is the seeding. In the NFL or NBA there are enough shared games that the seeding is relatively fair. However, we would still end up arguing about who was seeded number 1 and who was seeded number 8. This just emphasizes your basic premise which is that their is no attempt in any sport to find the best team. As fans we want something to chear for and some agreement about the rules which will be applied. You get that with a playoff and you get that with a BCS. Both are correct from a certain perspective and both are flawed from other perspectives. A playoff makes the champion the team who had a good streak at the end of the year and an adequate regular season (to get into the playoff) the champion. The BCS says the team who had a great regular season and a win at the end of the year is the champion. I do not believe either of these definitions is superior. However, without the BCS as a Longhorn fan I would not care too much about the regular season because I would assume we would make the playoff most years (if 8 teams got in). So the BCS means I have more games to chear for. I can't tell you how many games i watch hoping a team ranked ahead of us will lose - all this goes away without the BCS. Anyone who thinks this is a moral debate in my mind should spend a little more time analyzing the situation and realize we are really talking about fun and enjoyment.