Indianapolis Colts quarterback Andrew Luck has been ruled out for Thursday's game against Pittsburgh.
It was announced Monday night that Luck was undergoing the NFL's concussion protocol.
Luck was sacked twice during Sunday's game against the Tennessee Titans. The team didn't remove him during the game, and there was no indication until Monday that a concussion was suspected.
Wednesday afternoon the Colts Tweeted that Luck would be OUT for the Thanksgiving day game.
Andrew Luck has been ruled OUT for #PITvsIND.
Injury Report powered by @ATIPT: pic.twitter.com/CwOSpADAL7
— Indianapolis Colts (@Colts) November 23, 2016
Strong safety Clayton Geathers is also out for Thursday's game. Geathers made a game-winning fourth-down play on Sunday.
