Lots of teams have no more than 1 suspect performance (though part of that is many have only played 1 notable opponent)

1. Georgia - looked suspect against Kent St but good against everyone else
2. Alabama - suspect against Texas, great against everyone else
3. Ohio St - looked pretty good against everyone. In retrospect maybe only ok against Notre Dame
4. Michigan - dominated every opponent besides Maryland
5. Clemson - beat up on everyone before looking weak against Wake 
6. USC - looked pretty mediocre against Oregon St but did well against everyone else
7. Kentucky - very alarming against N Illinois, but good otherwise solid
8. Tennessee - not really any concerning results. Only close games have been wins over top 20 opponents
9. Oklahoma St - very concerning against Central Michigan, but the rest have been good
10. NC State - barely beat East Carolina, but otherwise good
11. Penn St - not great against Purdue, but otherwise solid
12. Utah - obviously lost to Florida, but have otherwise solidly beat weak opponents

And then you get to 13 and beyond where teams do have multiple weak/concerning results (Oregon vs Georgia and Wazzu, Baylor vs BYU and Iowa St, Ole Miss vs Tulsa and Troy,