Alex Smith suffered a concussion in the third quarter of the Kansas City Chiefs' 30-14 victory over the Indianapolis Colts on Sunday.
Smith's head slammed against the ground as he was sliding on a scramble. He didn't return to the game.
In the first quarter, Smith left the game to be evaluated for a concussion following a hit to the upper body in the first quarter. He didn't have a concussion and returned to game even though he had a cut on his ear. He re-entered the game with 10:00 left in the second quarter.
Smith's head bounced off the turf after he was hit by linebacker Edwin Jackson on the game's opening drive. Nick Foles replaced Smith in the first half and then again in the third quarter.
Smith finished the game connecting on 9 of 19 passes for 127 yards and a touchdown.
Signed by the Chiefs after he was released (by request) by the Rams in the preseason, Foles showed command of the offense in a preseason loss to Los Angeles. He had yet to play a regular season down in 2016 until Sunday, but engineered an 80-yard Chiefs drive that ended in a touchdown pass to Travis Kelce.
Foles finished with 16-of-22 passing for 223 yards and two touchdowns in the win.
