Can we stop calling him Wonderboy for goodness sake? He's 36 years old.
As for the fight, Thompson gets cracked in nearly every fight. Woodley x2, Brown, Till, Ellenberger all dropped/rocked him at least once. Pettis offensive wrestling is ok, he definitely had the grappling advantage, & Rufus is in his corner who has studied Thompson more than anyone in mma. The size discrepancy is overrated. Thompson has stated he walks around between 185-190, Pettis came into fight week at 182. Low kicks could a big ingredient here for Pettis. Thompson is super heavy on his lead leg & Pettis throws very quick kicks.
Thompson should obviously be favored, but Pettis is absolutely live here. Moving up in weight has changed/re-birthed many careers over the last 5 years so who knows what Pettis will even look like.