LSU is at home and losing by 10. An LSU loss helps BYU in two ways.
1. LSU is on the bubble and Tennessee, although not a bad loss yet (their RPI is 97), it is definitely a game that LSU should win and their RPI will drop.
2. Texas A&M is on the bubble and only has 2 top 50 wins. Both of those wins are against LSU, who is currently 47th in RPI. An LSU loss will no longer make them a top 50 RPI win for Texas A&M and they will have zero wins over top 50 teams.
Anyways, GO TENNESSEE!