Koscheck has dropped two straight fights, including a decision to current No. 1 welterweight contender Johny Hendricks and, most recently, a first-round TKO to Robbie Lawler. Prior to that, he had won back-to-back bouts over Matt Hughes and Mike Pierce after losing a title fight to champion Georges St-Pierre at UFC 124.
Maia was looking for his fourth consecutive win and potentially the next shot at the welterweight title. Since dropping from 185 to 170 pounds, the submission specialist has won bouts against Dong Hyun Kim, Rick Story and Jon Fitch.
It is not yet known if the fight will be shifted to a different date and location, or if new opponents will be found for each.
