The UFC saw two title fights in the month of December as Benson Henderson defended the lightweight belt against Nate Diaz and Cain Velasquez reclaimed the heavyweight championship by dominating Junior dos Santos.
Outside of the world's premier MMA organization, Bellator also crowned a new heavyweight champion. With Cole Konrad retiring, the belt was up for grabs in the heavyweight tournament final featuring Alexander Volkov and Richard Hale.
A year in MMA that had many ups and downs finished strong with its final month. Let's take a look at the fighters who delivered the best performances of December.