CHARLOTTE, N.C. - The Carolina Panthers have signed offensive tackle Mike Remmers and safety Robert Lester to their 53-man roster.

Remmers had been with the Rams practice squad, while Lester was on Carolina's practice squad.

To make room, Carolina placed linebacker Chase Blackburn on injured reserve with a knee injury and waived running back Darrin Reaves on Tuesday.

The Panthers had only three offensive tackles on the roster, and starters Byron Bell (elbow) and Nate Chandler (groin) are hurt.

The 6-foot-5, 300-pound Remmers spent time on practice squads in Tampa Bay, Minnesota and St. Louis. He played one game for the Chargers in 2013, and entered the NFL in 2012 as an undrafted free agent from Oregon State.

Blackburn played in six games this season, started two and has 11 tackles.

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