Bucs defensive end Tim Crowder's concussion symptoms apparently aren't subsiding quickly.

The Bucs placed the veteran on injured reserve today, ending his season after he sustained a concussion against the Panthers last Sunday. The Bucs replaced him on the 53-man roster by promoting rookie safety Ahmad Black from the practice squad.

Black, a fifth-round pick from Florida, was slowed by an ankle injury in the preseason and was unable to land a spot on the team's final roster. He has been on the practice squad ever since but now might get a chance to see some action.

The Bucs could be without backup safety Larry Asante (hamstring) on Sunday, possibly giving Black a chance to be activated on gameday.