College football rankings after Week 15: Updated US LBM Coaches Poll, AP Top 25

What is Indiana's ranking in the US LBM Coaches Poll after beating Ohio State?

How do upsets affect the final CFP rankings projection?

How did Duke's ACC championship win impact AP Top 25 rankings?

How many first-place votes did Georgia receive in the Coaches Poll?

By late afternoon, a College Football Playoff bracket will be set with 12 teams competing for a national championship.

Before that can take place, though, there will be one last iteration each of the US LBM Coaches Poll and AP Top 25 — rankings that, while not relevant to the final CFP bracket, will surely be looked at comparative to the CFP selection committee's final top 25.

The Dec. 6 schedule of games began with No. 6 Texas Tech (No. 4 in CFP rankings) securing a first-round bye with a commanding 34-7 win over BYU in the Big 12 Championship game thanks to a four-turnover day from its top-ranked defense.

REQUIRED READING: CFP bracket: Who made 12-team College Football Playoff field?

No. 3 Georgia (No. 3 in CFP rankings) nearly pitched a shutout against No. 10 Alabama (No. 9 in CFP rankings) in the SEC Championship game, before the Crimson Tide got on the board with a fourth-quarter 23-yard touchdown connection between Ty Simpson and Germie Bernard. Gunner Stockton threw three touchdowns in the Bulldogs' their fourth SEC championship under Kirby Smart.

Both night games delivered instant thrillers. In the Big Ten, Curt Cignetti and No. 2 Indiana (No. 2 in CFP rankings) completed their historic program turnaround with a 13-10 upset over No. 1 Ohio State (No. 1 in CFP rankings).

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Speaking of historic moments, Manny Diaz's five-loss Duke squad created CFP chaos by holding on in overtime against No. 16 Virginia (No. 17 in CFP rankings) in the ACC Championship game for its first ACC title. Darian Mensah threw a touchdown on fourth-and-1 in overtime to Jeremiah Hasley, while Luke Mergott intercepted Virginia quarterback Chandler Morris on the next series to seal the upset.

Here's a look at how Week 15's results in college football were reflected in the US LBM Coaches Poll and AP Top 25 rankings:

College football rankings after Week 15

US LBM Coaches Poll

1. Indiana (61)

2. Georgia (1)

3. Ohio State

4. Texas Tech

5. Oregon

6. Ole Miss

7. Texas A&M

8. Oklahoma

9. Notre Dame

10. Miami

11. Alabama

12. Vanderbilt

13. BYU

14. Texas

15. Utah

16. USC

17. Michigan

18. Tulane

19. James Madison

20. Arizona

21. Virginia

22. Georgia Tech

23. Tennessee

24. Houston

25. Navy

Others receiving votes: Iowa 102; North Texas 89; Missouri 51; Duke 43; SMU 32; Washington 24; Illinois 10; Boise State10; TCU 9; Pittsburgh 9; Arizona State 8; South Florida 7; Louisville 7; Connecticut 7; Penn State 6; Kennesaw State 3; UNLV 2; Old Dominion 2; Western Michigan 1; San Diego State 1.

AP Top 25

1. Indiana (66)

2. Georgia

3. Ohio State

4. Texas Tech

5. Oregon

6. Mississippi

7. Texas A&M

8. Oklahoma

9. Notre Dame

10. Miami

11. Alabama

12. BYU

13. Vanderbilt

14. Texas

15. Utah

16. Southern California

17. Tulane

18. Michigan

19. James Madison

20. Virginia

21. Arizona

22. Navy

23. North Texas

24. Georgia Tech

25. Missouri

Others receiving votes: Houston 82; Iowa 74; Tennessee 61; New Mexico 21; Duke 18; Boise State 16; UNLV 10; South Florida 10; SMU 8; Arizona State 6; Louisville 6; UConn 5; Washington 4; Pittsburgh 3; Kennesaw State 3; Illinois 2; Iowa State 2; Western Michigan 1; TCU 1.