The Packers will give 2012 seventh-round pick B.J. Coleman a chance to unseat Graham Harrell as Aaron Rodgers' primary backup. Coleman isn't as athletic as Harrell, but he's got a bigger arm and stands firmer in the pocket. His presence may be the reason the Packers never upgraded the position behind Rodgers this offseason. Coleman's biggest limitation is his shortage of athleticism. Coaches want him to improve throwing on the run.