Harbaugh worries that Kaepernick’s arms are getting too muscular

Jim Harbaugh likes the fact that 49ers quarterback Colin Kaepernick works hard in the offseason. But he’s a little worried that Kaepernick could be overdoing it. In fact, Kaepernick works so hard in the weight room that Harbaugh is worried his upper body could be getting so big and muscular that it could affect his…