AP

The Bills have signed running back Daniel “Boom” Herron to bolster their banged-up running back room.

The Bills worked out some running backs, including Trent Richardson, on Tuesday because rookie starter-for-now Karlos Williams is dealing with a concussion. LeSean McCoy is out indefinitely with a hamstring injury.

Cierre Wood was promoted from the practice squad last week. Boobie Dixon is probably ahead of Herron and Wood in line as Williams, who’s scored a touchdown in every game this season, awaits clearance.

The Colts waived-injured Herron last month and then released him from injured reserve with a settlement. Herron is a veteran of 25 career games and three starts and played well down the stretch and in the playoffs for the Colts last season. The Colts signed him off the Bengals’ practice squad in 2013.

The Bills created a roster spot for Herron by placing tight end MarQueis Gray on injured reserve. The team also signed wide receiver Walter Powell to the practice squad.