After their fight at UFC 137 a defeated and humble BJ Penn announced his retirement from MMA. Now Penn is on Twitter talking trash to the current #1 contender.

@nickdiaz209 Look how much bigger you are in this pic..I thought you were gonna scrap from the beginning homie? What was that coward fence holding strategy to tire out the smaller man? Street fighter my ass! I made you fight like glass jaw @jonfitchdotnet poser!

Diaz pummeled Penn in their fight and it’s weird to see Penn talking trash since Diaz won convincingly and the two made up after the fight in the locker room after a few weeks of trash talk.