College football rankings: Big 12 teams in updated Coaches Poll, AP Top 25 after Week 5

( This story has been updated with new information ).

The Big 12 was subject to multiple upsets in Week 5 of the college football season.

The biggest, in terms of difference in rankings, came Saturday night as unranked Arizona upended No. 10 Utah 23-10 in Rice-Eccles Stadium, dropping the Utes from the ranks of the unbeaten. But they weren't the only previously undefeated teams to suffer their first loss in Big 12 play on Saturday.

Colorado, which got a Heisman Trophy-esque performance from Travis Hunter, dropped UCF to 3-1 on the season with an impressive 48-21 victory in what was arguably the Buffaloes ' most complete victory of the season.

REQUIRED READING: What Deion Sanders said after Colorado football's upset win vs UCF

Elsewhere, in the only ranked meeting of the day, No. 25 Kansas State handily beat No. 20 Oklahoma State 42-20, helping erase the bad taste of a 38-9 defeat the week prior to BYU.

Here's how those games, and more, affected the Week 6 US LBM Coaches Poll and AP Top 25:

College football rankings for Week 6

US LBM Coaches Poll

Big 12 teams bolded. First-place votes in parentheses.

1. Texas (29)
2. Alabama (19)
3. Ohio State (7)
4. Tennessee
5. Georgia
6. Oregon
7. Penn State
8. Miami
9. Missouri
10. Michigan
11. Ole Miss
12. LSU
13. Notre Dame
14. Clemson
15. USC
16. Iowa State
17. Oklahoma
18. Utah
19. BYU
20. Kansas State
21. Texas A&M
22. Louisville
23. UNLV
24. Indiana
25. Illinois

Others receiving votes: Boise State 103; Pitt 51; Arizona 44 ; Rutgers 35; Iowa 29; James Madison 25; Duke 22; Kentucky 17; Oklahoma State 15 ; SMU 14; Nebraska 12; Navy 9; Colorado 9; Boston College 6; Army 3; UCF 2 ; Liberty 2; Tulane 1; South Carolina 1.

AP Top 25

Big 12 teams bolded. First-place votes in parentheses.

1. Alabama (40)
2. Texas (19)
3. Ohio State (4)
4. Tennessee
5. Georgia
6. Oregon
7. Penn State
8. Miami
9. Missouri
10. Michigan
11. USC
12. Ole Miss
13. LSU
14. Notre Dame
15. Clemson
16. Iowa State
17. BYU
18. Utah
19. Oklahoma
20. Kansas State
21. Boise State
22. Louisville
23. Indiana
24. Illinois
25. UNLV

Others receiving votes: Arizona 106; Pitt 42; Nebraska 30; Boston College 18; Iowa 17; James Madison 13; Oklahoma State 8; South Carolina 8; Rutgers 7; Kentucky 6; Navy 6; SMU 4; Army 2 ; Colorado 1.

This article originally appeared on Fort Collins Coloradoan: College football rankings: Big 12 teams in updated Coaches Poll, AP Top 25 after Week 5