I guess I'm in the minority on this one because it looked like a good stoppage to me. He covered up, but did NOTHING to get out of that position. He was just taking the punches and Hallman was serving them up pretty hard and fast as someone else already mentioned. There was no kicking or attempted leg submission, he turtled up and paid the price for not trying to defend himself better. I've never been a fan of his holier than thou attitude, and after seeing how unprepared he was last night after being given another shot only made happier that he lost.
On a more sincere note he won't be in top form again until he figures out all his health issues he's been having. Hopefully he can get his life together outside of fighting before he attempts to do it again.