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Teams with 1st Loss Week 4: 13
Vanderbilt
Iowa
California
Oklahoma State
Colorado
Mississippi State
Toledo
Kentucky
Oregon
Houston
Eastern Michigan
Maryland
Michigan State

Teams with 2nd Loss Week 4: 21
Temple
Boise State
Arizona
Purdue
UNLV
Florida State
Old Dominion
Air Force
Syracuse
Army
Arkansas
Appalachian State
Louisiana Tech
Central Michigan
Cincinnati
(Coastal Carolina)
UAB
Ball State
UCLA
Connecticut
Arkansas State

Teams with 1st Win week 4: 4
Louisiana-Monroe
Georgia State
Hawaii
East Carolina

Percent of Undefeated Teams with 1st Loss
Week 0/1: 36.15% (47/130)
Week 2: 37.35% (31/83)
Week 3: 28.85% (15/52)
Week 4: 35.13% (13/37)

Maximum possible Undefeated Teams at End of the Regular Season:
8: The MAC can no longer have a team finish unbeaten. We can still finish with unbeaten champions in all leagues except the MAC and Sun Belt.

Week 4 Thoughts:
-I added the one loss column this week. Since the formation of the BCS, every single team with one exception to get into the BCS Championship/playoff bowls has had zero or 1 loss. The lone exception was 2007 LSU in what was probably the craziest year of college football I have personally witnessed. While the expansion to 4 will likely lead to more 2 loss teams in over the years, it is likely the vast majority of our 4 playoff bowl teams will be on the undefeated or 1-loss team lists at the end of the year. On the Group of 5 side, every team from outside the AQ/power 5 conferences to make it since the start of the BCS has had 0 or 1 loss except Boise State in 2014. The committee will be far more likely to award a 2-loss team than the polls, but again, the majority of team making it will be on one of these lists.

-Lots of teams seemed to struggle this week but most favored ones prevailed.

-Our biggest shake-up on the chase for the Rose and Sugar Bowls was in the Big 12. TCU beating Oklahoma State leaves the Horned Frogs and Oklahoma as the clear-cut favorites in the Big 12.

-In the SEC, we wondered if there might be a changing of the guard for the season of stronger teams. This week dispelled most those thoughts with Mississippi State, Vanderbilt, and Kentucky following up good wins with losses.

-The Group of 5 race is looking more and more like San Diego State vs. American champion to me. That really does seem to be all the Mountain West is competing with though as everyone else in the conference now has 2 losses. The only other undefeated team from outside those 2 conferences in the Group of 5 conferences is UTSA in Conference USA. Their win over Baylor helps, but only if Baylor wins a few games (they are getting closer). The last two undefeated MAC teams lost last week and while Toledo’s loss to Miami (FL) wasn’t terrible, I think it will be very difficult for a 1-loss MAC team to get in (remember last year there was even thoughts of the committee putting in a 2 loss Navy over undefeated Western Michigan). The only one I think they really have left in the running without looking through the rest of the schedules is probably Northern Illinios as the win over Nebraska helps. Troy is the only one left in the Sun Belt who I think could get into the same shape as Northern Illinois and it would take a win vs. LSU next week.

-There are no remaining possible games between winless teams this year in conference (Conference USA has two teams, but they are in opposite divisions and do not play this year). There is one game between winless teams possible next month though with independent UMass scheduled to play Georgia Southern.

Week 5 Thoughts:
-There are 4 games between undefeated teams next week with 2 of them on Friday: Miami (FL) vs. Duke (Friday), USC @ Washington State (Friday), Memphis @ Central Florida, and Clemson @ Virginia Tech

-Weird game: Winless Florida State plays at undefeated Wake Forest. (Florida State has only played 2 games due to Irma).

Remaining Undefeated Teams: ACC: 5, American: 4, Big 12: 3, Big Ten: 4, Conference USA: 1, MAC: 0, Mountain West: 1, PAC-12: 4, SEC: 2, total: 24
Clemson
Wake Forest
Duke
Miami (FL)
Virginia Tech
Oklahoma
Texas Tech
South Florida
Michigan
Minnesota
Penn State
Wisconsin
Memphis
Central Florida
San Diego State
Texas Christian
Utah
Southern California
Washington
Washington State
Georgia
Alabama
Navy
UTSA

 One-Loss Teams: ACC: 4, American: 2, Big 12: 4, Big Ten: 7, Conference USA: 3, MAC: 4, Mountain West: 0, PAC-12: 3, SEC: 10, Sun Belt: 1, independents: 1, total: 39
Southern Methodist
Virginia
Georgia Tech
Louisville
North Carolina State
Iowa State
Kansas State
West Virginia
Northwestern
Illinois
Ohio State
Indiana
Southern Mississippi
Marshall
Florida International
Notre Dame
Northern Illinois
Ohio U.
Texas A&M
Mississippi
Auburn
Louisiana State
Florida
South Carolina
Tennessee
Troy
Vanderbilt
Iowa
California
Oklahoma State
Colorado
Mississippi State
Kentucky
Oregon
Houston
Eastern Michigan
Maryland
Michigan State


 Remaining Winless Teams: ACC: 1, American: 0, Big 12: 1, Conference USA: 2, MAC: 1, Mountain West: 1, Sun Belt: 1, independents: 1, total: 8
Florida State
Baylor
Charlotte
UTEP
Massachusetts
Bowling Green
Nevada
Georgia Southern

Only 2 SEC undefeated team already, interesting (to me).