After watching Velasquez fight like a zombie from Rounds 3-5 in his fight against JDS last week, I've realized how impressive it has to be for a guy the size of Jon Jones to have the cardio and endurance he does. Jones looks so fresh coming in the 4th and 5th rounds that it's almost ridiculous, and doesn't skip a beat in there. Even in the 4th and 5th rounds, he's taking people down, throwing kicks and elbows without gassing out at all. Take the title defenses against Vitor, Rashad, and Rampage for example. All went to the 4th or 5th rounds, and he still managed to finish two of them.