Top Auburn receiver Emory Blake was in uniform on the sidelines after missing last week's game at Arkansas with a lower leg injury. DeAngelo Benton started in his place.
Demps has an ankle injury while Powell has an unspecified upper body injury. Demps came in as the Gators' No. 2 rusher with 209 yards and an 8.4-yard average per carry.
Powell has 14 tackles and two sacks.
Information from The Associated Press was used in this report.