News broke last week that the UFC was in talks with featherweight champion Conor McGregor and No. 5 ranked lightweight Nate Diaz to face off in the main event of UFC 200. The fight would be a rematch of their UFC 196 bout, which Diaz won via second-round submission. Like that fight, this one would also be contested at the welterweight limit of 170 pounds. Not surprisingly, some fighters are unhappy about the rematch.