LSU football was outscored 31 to 6 en route to a head-spinning 38-23 loss at Texas A&M Saturday night.

The Tigers had won six straight games before the defeat to the Aggies and their defense had been playing lights out. But A&M switched quarterbacks from Conner Weigman to Marcel Reed and the freshman led his team to four straight scoring drives to down LSU.

LSU (6-2, 3-1 SEC) now has a loss in SEC play and is tied for third in the conference standings with Texas and Tennessee.

How much did the loss affect LSU's standing in the updated college football rankings?

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GRADING LSU'S LOSS AT TEXAS A&M LSU football stumbles at Texas A&M. How we graded Brian Kelly, Tigers after first SEC loss

LSU rankings update

After its first loss in seven weeks, LSU took its largest tumble of the season down in the college football polls. The Tigers are now ranked No. 16 in this week's US LBM Coaches Poll, a fall of nine spots from last week. LSU has been ranked as low as No. 19 this year. The matchup with Alabama will be a top 20 showdown as the Crimson Tide comes in at No. 14.

College football rankings, Week 10

US LBM Coaches Poll

1. Oregon

2. Georgia

3. Penn State

4. Ohio State

5. Miami

6. Texas

7. Tennessee

8. Clemson

9. Notre Dame

10. Iowa State

11. Texas A&M

12. BYU

13. Indiana

14. Alabama

15. Kansas State

16. LSU

17. Pitt

18. Ole Miss

19. Boise State

20. SMU

21. Army

22. Washington State

23. Missouri

24. Illinois

25. Memphis

LSU'S CFP PICTURE Can LSU still make College Football Playoff? What's next for Tigers after Texas A&M loss

MISCUES DOOM LSU AT TEXAS A&M Turnovers tumble LSU football in rattling defeat to Texas A&M in game for SEC's top spot

Cory Diaz covers the LSU Tigers for The Daily Advertiser as part of the USA TODAY Network. Follow his Tigers coverage on Twitter: @ByCoryDiaz. Got questions regarding LSU athletics? Send them to Cory Diaz at bdiaz@gannett.com.

This article originally appeared on Lafayette Daily Advertiser: LSU football rankings: Tigers fall in update college polls