The Texans made it official: Tom Savage‘s season — and perhaps his career in Houston — is over. The team placed the quarterback on injured reserve Saturday. The Texans promoted tight end Ryan Malleck from the practice squad in a corresponding move. Savage was diagnosed with a concussion during the Dec. 9 loss to the 49ers. The league is investigating why he was allowed to re-enter the game for three plays after a hit from linebacker Elvis Dumervil left Savage in the “fencing posture.” Savage, who is scheduled to become a free agent in the offseason, was unimpressive in eight starts this season with a 1-7 record, a 56.1 completion percentage, 1,412 yards, five touchdowns and six interceptions.