UFC fans who were pleased to see referee John McCarthy back in the Octagon on Saturday night will be happy to know that they also saw him achieve a new milestone. By officiating the 
Rory MacDonald vs. 
Nate Diaz fight, McCarthy becomes the second man with 200 UFC fights under his belt (he got #201 with 
Jose Aldo vs. 
Mark Hominick).
With 
UFC 129 in the books, here is a list of the most fights by a referee in UFC history:
1. Herb Dean - 244
2. John McCarthy - 201
3. Mario Yamasaki - 163
4. Steve Mazzagatti - 158
5. Yves Lavigne - 108