He was stoped by Mitrione and Shawn Jordan with not so devastating shots so no his chin doesn't seem like it has improved.
Apparently he fought Shawn Jordan already early in his career in a fight that he lost by decision. Several years and many lbs later he got stopped by Shawn Jordan in a round......
Yeah he has improved since then but he didn't seem much improved after putting on tons of weight
How does being fatter and heavier help getting off the ground?
he isnt undefeated in the UFC but lost 2 winnable fights so how can you say that? he also had a pretty bad fight not that long ago where both he and his opponent looked gassed and where struggled a bit before winning.
Yes being bigger helps if you are on top but he isn't some great wrestler how is he going to get someone like Overeem, Miocic, Cain or JDS down?
No. Since then he has won some and lost some.