BJ Penn was fighting at the very top of the 170 lbs. division less than a year ago. If he had beat Diaz at 137 he would have went on to challenge Condit for the interim belt! What was Sherk doing last year? Not fighting one of the baddest mother fuckers in MMA, that's what. Sherk is no where near Penn's level and BJ proved that when he smashed Sherk's face in with a perfectly placed knee. 