Alex Oliveira Alex Oliveira is heading back to lightweight after a run of two straight wins at welterweight when he faces Piotr Hallman at UFC Fight Night 77. The fight was originally announced by Combate . Oliveira (12-2-1 MMA, 2-1 UFC) made his UFC debut at 155 pounds. He was caught in an armbar in Round 3 of his fight with Gilbert Burns and subsequently moved up to welterweight where he won fights with K.J. Noons and Joe Merritt. Now, on a two-fight winning streak, Oliveira will drop back down to lightweight