By Rick Reeno

In the wake of Brian Viloria's upset loss to Carlos Tamara, there is already some talk of a possible scenario where WBO minimumweight champion Donnie Nietes (26-1, 15KOs) would move up to junior flyweight to challenge unbeaten WBO champion Ivan Calderon (33-0, 6KOs). Nietes fought on Saturday's Viloria-Tamara undercard, stopping Jesus Silvestre in ten rounds.

Viloria was being positioned for a unification with Calderon for the month of April. Peter Rivera of PR Best Boxing told BoxingScene.com that a two fight series was being planned but in order to close the deal Viloria had to win the fight with Tamara. On paper Viloria was the heavy favorite in the fight. Viloria's stamina betrayed him in the late rounds. He built an early, but faded down the stretch before the referee stopped the action in the twelfth.