Colts officially rule Luck out

Getty Images

The Colts have listed Andrew Luck as out for Thursday night’s game vs. the Steelers due to a concussion.

Luck showed symptoms of a concussion on Monday and entered the league’s concussion protocol. He wasn’t able to participate in the team’s abbreviated practices this week, and the release of Wednesday’s injury report ended any remaining suspense about his status for this week.

Scott Tolzien will make his first start for the Colts and his first in three years. Tolzien started two games for the Packers in 2013.

Earlier Wednesday, the Colts promoted quarterback Stephen Morris from the practice squad to be Tolzien’s backup.