As much as I love Manny since he is my countryman, I do hope that he hangs up his gloves after this Thurman fight. A lot of people will say that Pac can still fight, and I wholeheartedly agree with that. However, we have seen the decline of the power of his punches in the recent years that he has been fighting, and most of that is due to him aging. I mean, the guy is 40 years old. He will lose a significant amount of speed in his footwork and his punches. Thurman, although coming out from his injury is 10 years his junior. The difference between speed and power will be noticable between these two fighters. If this was the Pac around 2012.2013, I'd give him an advantage. But this is not the case, so I will be betting on Thurman, as much as I love and respect Pac.
Technically, he can't just hang up his gloves. I'm sure when he signed with Al Haymon, it could be 3 to 5 fight contract. So this is just his 2nd fight under Premier Boxing, so he will definitely fight win or lose against Thurman.
Pac's version that fought Cotto will annihilate all current 147 lbs champions no doubt.