Sunday, November 12, 2017

Weekly Playoff Probabilities - Week 11

As always, explanation here, ranking below, thoughts after.

Rank Team Agg Rank POFF Prob Change
1 Alabama 1 88.25% 11.7%
2 Miami (FL) 11 75.87% 36.6%
3 Clemson 6 59.04% 15.2%
4 Wisconsin 8 48.38% 8.8%
5 Georgia 7 43.33% -23.7%
6 Notre Dame 10 29.10% -22.8%
7 Central Florida 18 19.97% -21.9%
8 Oklahoma 9 13.71% 7.1%
9 Ohio State 2 7.45% 2.0%
10 Penn State 3 6.32% -0.1%
11 Auburn 5 4.57% 3.6%
12 USC 17 2.59% 1.4%
13 Washington 4 0.55% -11.7%
14 TCU 13 0.37% -5.6%
15 Washington State 24 0.22% 0.2%
16 Oklahoma State 12 0.16% 0.1%
17 Michigan 19 0.15% 0.0%

1.  The biggest weekend of the year predictably leads to a bunch of shuffling up top.  Most of this probably makes sense....the top five seems like it's in the right order, and it makes sense that Auburn is behind the Big Ten teams because the prospect of beating Alabama and Georgia in back-to-back weeks is still pretty daunting.  But the teams in spots 6-7-8 seem pretty weird.  So let's talk about them.

Notre Dame - The Irish took their second loss in grand fashion, which seemingly knocks them out of the running.  But my model gives them a near 1 in 3 chance of making it.  The main reason for this is their preposterous .622 predicted SOS, which is easily the best in the field.  Only two two-loss teams have finished with an SOS in that neighborhood and both of those teams (1999 Bama and 2002 USC) made the BCS top four.  Now, obviously the committee has slightly different logic than the BCS did, but my underlying assumption that that logic has basically the same effect suggests that the Irish aren't dead yet.  It will be interesting to see where ND falls in the next set of rankings, especially in relation to fellow two-loss teams Auburn and Ohio State.

Central Florida - I mentioned previously that, while I love the Knights, my model was probably over-estimating them.  Much like the Irish, they are exhibiting a very strong SOS relative to their bucket.  Their .524 projected SOS is well above the gold standard of mid-majordom, 2009-10 TCU. But from the committee's initial rankings of UCF, it's pretty clear that nothing short of utter chaos is getting them into the field.  So I did a half measure, and re-ran the Group of Five model with 2017 UCF as a (negative) data point.  This has the effect of flattening out the curve for such teams, while still rewarding SOS to some degree.  The end result probably still overrates the Knights, but for a mid-season change I made in 30 minutes, I'll take it.

Oklahoma - The Sooners collected their third big win of the season, and will probably sit third or fourth in Tuesday's rankings.  So why is the team so low?  Well first of all, they only have a ~50% chance of winning out, so there's still some work to do.  But mainly, the really weak SOS of the Big 12 is hurting them a bunch.  A .513 projected SOS puts them in mixed company...for example, 2014 TCU and 2015 Iowa had similar ratings with one loss, and neither made the Playoff.  While it's probably true that the Sooners have little margin for error, I think my model is underrating them.  Sure, a good deal of their schedule consists of terrible teams, but if they finish 12-1, they'll have 4 or 5 wins against top-25-level teams, which the committee appears to eat up.  Should the Sooners make the Playoff, I may have to examine if other SOS measures are more predictive of the committee's behavior.

2.  Just three eliminations this week, with Mississippi State, Michigan State, and Virginia Tech all taking a third loss.  We are left with all of the top 13 teams in the aggregate rankings and only one team outside of the top 20.  This (in theory) means the championship games should give us the most even set of games in some time.

3.  There's been talk of two bids for the SEC for some time, but now we also have to entertain talk of two bids for the ACC as well.  Miami's position is suddenly quite strong, and it's entirely possible that they could survive a loss to Clemson and still make the Playoff.  In other news, the Pac 12 now has to rely on a USC team that will probably be 10th in the standings on Tuesday.

Conference Exp Playoff Teams
SEC 1.361
ACC 1.349
B10 0.623
IND 0.291
AMER 0.200
B12 0.142
P12 0.034

4.  Five divisions have been decided, all in power conferences (this makes sense, as those teams are more likely to take the penultimate week off and are more likely to have non-conference rivalries to end the year).   In the Mountain West, we will likely get a title game preview the week before (great scheduling, guys).  And the Sun Belt is nuts after another wild upset...this time USA over Arkansas State.

Conference Favorite Perc   Runner-Up Perc
ACCA Clemson 100.0%      
ACCC Miami (FL) 100.0%      
AMEE Central Florida 78.6%   South Florida 21.4%
AMEW Memphis 98.8%   Houston 0.8%
B10E Ohio State 90.0%   Penn State 4.5%
B10W Wisconsin 100.0%      
B12 Oklahoma 97.1%   TCU 65.1%
CUSAE Florida Atlantic 99.7%   Florida International 0.3%
CUSAW North Texas 97.4%   Southern Miss 1.4%
MACE Ohio 81.3%   Akron 18.7%
MACW Toledo 72.0%   Northern Illinois 19.1%
MWCW Fresno State 76.4%   San Diego State 23.1%
MWCM Boise State 97.5%   Wyoming 2.5%
P12N Stanford 73.3%   Washington State 16.2%
P12S USC 100.0%      
SECE Georgia 100.0%      
SECW Alabama 61.1%   Auburn 39.0%
SUN Appalachian State 39.4%   Arkansas State 26.7%


Week 12 Preview

Home Away Home Win Prob Playoff Teams Lost
Wisconsin Michigan 76.9% 0.038
Temple Central Florida 12.5% 0.025
Notre Dame Navy 93.0% 0.020
Miami (FL) Virginia 92.8% 0.018
Georgia Kentucky 93.8% 0.013
USC UCLA 80.8% 0.005
Penn State Nebraska 95.9% 0.003
Kansas Oklahoma 1.8% 0.001
Texas Tech TCU 28.2% 0.001
Ohio State Illinois 99.0% 0.001

The best week of the year is followed by the worst.  Six of the top ten games have >90% odds for the favorite, and the rest aren't all that great.  Watch Wisconsin-Michigan in the early slot and then go find something else to do.  Rest up for the last two weeks.

No comments:

Post a Comment