Pat Angerer diagnosed with a concussion

INDIANAPOLIS -- Indianapolis Colts starting linebacker Pat Angerer knew something wasn’t right.

The constant headaches. The blurred vision. The memory loss.

But the only thing on Angerer's mind was Sunday’s season opener against the Oakland Raiders.

That’s why he held out mentioning anything to the coaching and medical staff until it got to the point where he couldn’t handle the constant problems.

It turns out he wasn’t dealing with just a normal headache. He was diagnosed with a concussion after going through the test Thursday, putting his status for Sunday’s game highly in question.

That’s not the worse news for Angerer.

He suffered the concussion on the first play in the Aug. 29 preseason finale at Cincinnati. He played 22 more plays on defense and three plays on special teams in that game to go with three practices this week before he was diagnosed with the concussion.

“I just didn’t know what it was,” Angerer said. “Headaches, memory loss, all that (expletive). I just figured it would pass. I just wanted to play, so I didn’t say anything. It never went away.”

The concussion adds to the frustration Angerer has experienced the past year. He was limited to 11 games last season because of a foot injury after he led the Colts with 146 tackles in 2011.

Angerer can't practice until he passes the NFL’s concussion protocol. The protocol “combines a symptom checklist, a limited neurological examination including a cognitive evaluation, and a balance assessment.”

Kelvin Sheppard will start at linebacker if Angerer doesn’t play.