By Rey Colon

Ivan Calderon (35-2-1 and 6KO's) was waiting until April 28th to challenge Mexico's Moises Fuentes (14-1, 6 KO's) for the WBO's minimumweight title, but the veteran boxer from Puerto Rico has advised BoxingScene.com that his bout with Fuentes is being pushed back to a date in late May.

Calderon was the longtime WBO champion at 105-pounds, before moving up for a run at 108 and losing two fights with Giovani Segura.