Sean O’Malley is a lot more confident going into his second fight against UFC bantamweight champion Merab Dvalishvili . O’Malley (18-2 MMA, 10-2 UFC) rematches Dvalishvili (19-4 MMA, 12-2 UFC) on June 7 in the UFC 316 headliner at Prudential Center in Newark, N.J. O’Malley lost his bantamweight title to Dvalishvili at UFC 306 by unanimous decision last September. O’Malley later revealed that he went into the fight with a torn labrum in his hip and underwent surgery after the fight to repair it. He said the injury hampered his ability to do any grappling in camp. “This sounds like I’m exaggerating, and I’m not,” O’Malley said on “The Ariel Helwani Show.” “Just today, this morning practice that I had, I grappled more today than I grappled last fight camp for Merab