Falcons missing Grimes, Nicholas against Bucs
The Falcons also are without another defensive starter, linebacker Stephen Nicholas, who is missing his second straight game with a toe injury.
Grimes missed three straight games following minor surgery on his right knee before returning to make seven tackles last week at New Orleans. He was listed as questionable this week with the sore knee.
Benn, who has 30 catches this season, is being held out with a neck injury. The Buccaneers also are without backup Sammie Stroughter.
Tampa Bay offensive tackle Jeremy Trueblood is out due to a concussion.