What other fighter has had this much experience while still in his prime?

I think he'll come up a little short of Pac and ODLH in terms of what he attempted in his career but he's doing more of what they did than anyone else today.

 

canelo has one of the best records out there but baldomir, mosley and angulo were fossils when he beat them, i doubt he learnt anything from these fights sice they offered zero resistance.
Kovalev and chavez jr were badly faded, even though kovalev managed to frutrate him just by using the jab and holding the distance, so maybe he learned how to deal more effectively with bigger men in that fight.
the most rewarding fights were trout, golovkin, lara and mayweather

 

Jack Britton.

 

He'll look 60 when he turns 40 after all this.

 

Canelo will go down as an all-time great. You can be a fan of his, or root against him, or think he won this fight, or believe he lost that fight ... but he'll go down as an all-timer. He already is.

 

Pacquiao. Look at his record before Cotto in 2009 (considered the peak of his prime by many).

 

Sugar Ray Robinson.

 

Id say Marco Antonio Barrera, and of course Julio Cesar Chavez.