The first thing I thought of was that he was trying to find a way to delay the fight as long as possible.
I'm not saying he's faking an injury or anything because an injury needs to be confirmed by a doctor. There's a lot of fans around here that I've seen talk about a fighter faking an injury, but I don't see how that's possible because it has to be confirmed by a doctor. Unless they paid a doctor to make some fake shit up, I don't know. It's very possible to do that, but let's not jump to any conspiracies here.
But this is too much of a coincidence. Now that Punk finally has an opponent and basically has a date set, he gets injured and needs surgery or something? Yeah.. what are the odds.. seems a little strange to me.