Greg Hardy says he's feeling extremely "positive" after his impressive UFC performance on Tuesday -- and says he wants to prove to his haters that he's truly a changed man.
TMZ Sports spoke with the ex-NFL star after his 57-second knockout victory over Austen Lane on Dana White's Tuesday Night Contender Series ... and you can tell he's excited about his MMA future.
"I'm feeling great. I'm feeling positive. I'm feeling excited. I'm ready to go ... ready to take this next step and see where it takes us.