I don't know what happened to him, after his win over Weidman I was expecting him to be on top of the middleweight division for a while. Of course then that surprise KO loss to Bisping happened and he doesn't seem to be able to get back on track ever since. Then again, he's only lost to one of the best 185ers and a perennial contender at a higher weight class ever since. Maybe all he needs is a few more David Branch type bouts to find his footing again. But it's going to be tough now that middleweight has had an influx of so much great talent.
I feel bad for him, I like the guy, he's yet another one of those fighters that seem to annoy all the right people.