theknightswhosay

Top 25 after Week 11

In College Football, Rankings, Rankings Commentary on November 11, 2018 at 4:59 PM

Alabama did end up becoming #1 based on the computer data.  This is both in the formula that I’ve been using for about 10 years and in the “weighted ratings,” which I created last year to give higher ratings for playing very good opponents. 

For instance, I think Mississippi St. is one of the 25 toughest teams to beat, but they’re not in the top 25 below since that system averages every week together equally.    So when Mississippi St. lost to Alabama and beat Auburn, they got 0.27 for those two weeks.  That’s fewer points than Alabama-Birmingham got for beating Charlotte and Texas-San Antonio, for example.  I don’t think for a second Alabama-Birmingham would beat Auburn or Alabama (we’ll see how they do against Texas A&M), but since they have a lot more mediocre wins than losses they appear higher in the original rankings than Mississippi St. does.  The Bulldogs have 4 losses to the Blazers’ 1, so it’s hard for them to overcome the loss disparity AND get enough points in the 5 FBS wins to get a higher rating than UAB (with 8 FBS wins).

So why don’t I just use that system for everything?  The best example is the final rating of last year.  It exacerbated the differences between Alabama’s and Georgia’s respective schedules and gave Georgia the higher rating.  Georgia played Auburn twice, and the second time they did it, Alabama was idle because only two teams can be in the SEC Championship game.  So playing the extra quality opponent, along with the overall schedule, helped Georgia overcome having the extra loss.  I think Georgia and Alabama were close enough in my original formula, so I wouldn’t want to try some kind of average either. 

If Georgia Tech had won a couple more games, for instance, Alabama should have still been #1 after beating Georgia.  But I agreed with the top 4 it picked before the bowl games last year, so it may continue to be useful for that purpose among the top teams.  Also, the SEC is good; but I’m not sure 9 SEC teams in the top 25 (the result of the weighted formula right now) is appropriate, so I’m not using it at all for the top 25 at this time.

I think at the end of last season my weighted ratings did a better job with teams lower in the top 25, at least if your primary concern is most difficult teams to play, which is probably closer to the CFP committee’s thinking.  It’s more difficult in both my weighted ratings and in the CFP for teams in lesser conferences to rise in the rankings.    After last season, I used the original rankings for the top 10 and the weighted ratings for 11-25.  I may follow something similar at the end of this season; but since it’s new, I’m not sure if that will be the optimal solution every year.

For now, the entire top 25 is exactly as dictated by the original ratings. 

The Clemson offense celebrates a touchdown in Chestnut Hill, MA, on Saturday.  The Tigers were never threatened and won 27-7, their closest win since September.  Clemson hosts (23) Duke next week before completing the regular season against South Carolina.

I still do not expect Alabama to be first in the original ratings after next week because FCS opponents do not help ratings very much (look how far Army fell); and both Clemson and Notre Dame are playing fairly good opponents (Duke and Syracuse, respectively).  These results tell me that I made the right call last week in keeping Alabama #1 and Clemson #2 for continuity between two weeks ago and now.  Also, Clemson has clinched a berth in the ACC title game, which will help the Tigers to finish ahead of Notre Dame assuming they keep winning.

The two new Mountain West teams in the top 25 is a little strange, but this might help explain how the formula can react to obscure results.  The main reason is that both Boise St. and Utah St. were in the top 30 to begin with and both won, but that’s not the whole story.  BYU’s win over Massachusetts helped their value as an opponent not because the Minutemen are very good, but they did have good opponents themselves.  This contributed to the increase in points for both Boise St. and Utah St. as well as the Mountain West in general (BYU also played Hawaii).  Of course it also helped Boise St. a lot to beat Fresno St.  Utah St.’s win over San Jose St. didn’t count for much, but UNLV’s upset win over San Diego St. (which Utah St. does not play this year) helped the Aggies too.  Also, Boise St. and Utah St. helped one another because both are in the Mountain Division and both beat teams in the Western Division.

Utah (which has not played BYU yet) got back on track with a win over Oregon.  The Utes also have a helpful non-conference win over Northern Illinois, which is now 7-3.  It also helped that two of the three teams who beat Utah won on Saturday (and the other was idle).

Cincinnati benefited from losses by six teams between 15th and 26th (the Bearcats were 27th last week).  Three additional teams (Buffalo, Duke, amd UAB) in that range got very few points, so Cincinnati would have moved up significantly even if they’d played a worse team than then-7-2 South Florida.  Since South Florida has now lost 3 in a row and might well lose 5 in a row, the Bearcats will have to beat Central Florida to keep going up.  So I wouldn’t expect two American Conference teams to be in the top 15 for very long.

Anyway, it’s important not to just look at last week’s results and think that’s the whole story of why a team moves from Point A to Point B.

RankTeamPrev.
1Alabama1
2Clemson2
3Notre Dame3
4Georgia4
5Michigan5
6Oklahoma7
7LSU6
8Ohio St.10
9Wash St.8
10W. Virginia11
11Penn St.15
12C. Florida13
13Boise St.
14Florida17
15Cincinnati
16Texas21
17Army12
18Kentucky9
19Buffalo18
20Washington16
21Utah
22Utah St.
23Duke22
24UAB23
25Iowa St.

Out of Top 25: (14) Michigan St., (19) Fresno St., (20) NC State, (24) Iowa, (25) Boston College

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  1. […] from some remotely possibly upsets of top teams (I mentioned Clemson and Notre Dame in the Rankings blog), I’m not wildly excited about any of the matchups this week.   I still thought of […]

  2. […] from some remotely possibly upsets of top teams (I mentioned Clemson and Notre Dame in the Rankings blog), I’m not wildly excited about any of the matchups this week.   I still thought of somethings […]

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