Calvin Johnson has been playing with nerve damage side effects since facing the Vikings in Week 3.

"Actually, I had some nerve damage, so that was kind of messing up my grip a little bit," Johnson said. "Not to blame it on that, but I think that a concussion maybe could have had something to do with some of that damage I had going on."

Johnson was the victim of a brutal helmet-to-helmet collision with Minnesota Vikings linebacker Chad Greenway.

Johnson has been feeling a shooting pain in his arm since that game, which has affected his ability to hold a football.

"Taking those hits, they're real violent," Johnson said. "They definitely have a lot of lingering impact on whether it be your neck, your head in Jahvid's (Best) case. It can do a lot of stuff."