6. Luke Rockhold
This is not to say Luke Rockhold is not a great fighter because he is. This is only to say Luke Rockhold was not a great champion. In fact, Rockhold was one of the worst champions in UFC history.
Rockhold threw the middleweight division for a loop when he took Michael Bisping lightly at UFC 199. Bisping would hold the division hostage for 1.5 years after. Thanks, Luke.
Since losing the title to Bisping, Rockhold has defeated David Branch and been knocked out by Yoel Romero.
