Reports are Capt hasn't started any fights....he just doesn't back down. Captain just lacks size....and experience. He is a tad over aggressive at times and that is probably only a useful trait when you can pressure a QB....
But he has IMO had some pretty good coverage on some big plays. I remember 2 last year where he just lost his footing....yeah, he gave up the pass but he was all over the assignment.
Well he's not going to grow anymore, and he's going into his 3rd year, lack of expierence can no longer be an excuse. The guy doesn't have elite speed and is small, and we're in a division of #2 recievers that aren't far behind their #1 as far as talent goes. If I was a OC and saw Munnerlyn on Julio Jones or Mike Williams, I'm going to throw to his side all day. He's already 4+ inchers shorter, with shorter arms etc, it doesn't take much to out muscle him.