Saturday's 40-33 overtime loss to the Mustangs pulled TCU out of the top 25 rankings.
After the win against Portland State last week, TCU ranked No. 20 on both the AP and USA Today polls.
SMU was able to break the Horned Frog's 22-home game winning streak.
AP Top 25
1 LSU
2 Alabama
3 Oklahoma
4 Wisconsin
5 Boise State
6 Oklahoma State
7 Stanford
8 Clemson
9 Oregon
10 Arkansas
11 Texas
12 Michigan
13 Georgia Tech
14 Nebraska
15 Auburn
16 West Virginia
17 Florida
18 South Carolina
19 Illinois
20 Kansas State
21 Virginia Tech
22 Arizona State
23 Florida State
24 Texas A&M
25 Baylor
USA Today Poll
1 Oklahoma
2 Alabama
3 LSU
4 Stanford
5 Wisconsin
6 Boise State
7 Oklahoma State
8 Clemson
9 Oregon
10 Texas
11 Michigan
12 Arkansas
13 Georgia Tech
14 South Carolina
15 Nebraska
16 Illinois
17 Virginia Tech
18 Florida
19 West Virginia
20 Michigan State
21 Kansas State
22 Florida State
23 Auburn
24 Arizona State
25 Texas A&M
Bold indicates a MWC opponent.