Keenum suffered a sprained thumb against the Indianapolis Colts, Texans interim head coach Wade Phillips said. He said he would know more about Keenum's status for the game once he finds out the results of the MRI.
It wasn't the only way in which Keenum was beat up in that game, having played his worst game as a pro.
"Sometimes (young quarterbacks) have to hit rock bottom to bounce back up," Phillips said. "Some of them don't bounce back up, and don't end up good quarterbacks. We have to help him."
Phillips said Sunday that he wouldn't be sure exactly what went wrong for Keenum until seeing the film. His post-film assessment Monday afternoon was similar to his postgame assessment. It was just overall a rough day for the quarterback, who completed 18 of 34 passes for 168 yards, no touchdowns and two interceptions. He also fumbled in the end zone when Colts outside linebacker Robert Mathis sacked him.
One issue for Keenum early on was recognizing blitzes. He's studying and learning how to do that.
"He saw the blitzes when they were coming," Phillips said. "But seeing blitzes and getting rid of the football is different than just seeing them. That and reading coverages. It's not an easy process, especially for a young quarterback to know. We've just gotta find the things that he really does well and we've gotta stick with those."