Pittsburgh Steelers running backs Le'Veon Bell and Isaac Redman suffered injuries during practice on Thursday and did not return, the Pittsburgh Post-Gazette reported.
Bell, a rookie second-round draft pick who is competing with Redman for a starting job, reaggravated a sore left knee that kept him out of the first preseason game.
Redman had a stinger after taking a hit from inside linebacker Larry Foote.
Coach Mike Tomlin indicated that neither injury was serious.
The Steelers list Belland Redman as co-starters on the depth chart.
Pittsburgh's next preseason game is Monday night against the Washington Redskins.