Cleveland, OH. (PFCritics) -- The San Francisco 49ers signed fourth-round draft pick Michael Robinson on Tuesday. Robinson, who played quarterback at Penn State, will not be playing that position in the NFL. The 49ers plan on using Robinson's speed as a running back. In college, he had experience at the quarterback, wide receiver, running back, and punt returner positions.

The 49ers still need to sign both of their first rounders, tight end Vernon Davis and linebacker/defensive end Manny Lawson.