He struggled with TDs vs Nick Diaz.
His wrestling went way down after the first ACL tear. He's now had two. He's done as a championship threat.
There was also some crazy stat about how much he got his his last 3 fights. It was almost as much as he'd ever got hit before combined, or something ridiculous like that (don't quot me on the specifics, but it was a shocking stat).
That said, I have little doubt when GSP is 50, he will be in better shape than most people ever know. Hardest working of the top 5 GOATs (Fedor, Anderson, Jones, Aldo).