Sorry dude but I have to disagree, first time I've seen this fight but for those who haven't check the following vid out.

Dirrell is clearly scared to engage, he continuinely pot shots from the outside with meaningless taps. Not watched the earlier rounds but the man is plain just running.

On a side note, he's gonna get caught one of these days with that leaning back bullshit a la Naz Hamed. Athletiscism or not, with question marks over his chin he really shouldn't be doing that..

http://www.youtube.com/watch?v=fFTYMloG5m0