You can not use Manny/Shane as proof of how Manny/PBF will go

[IamInuit]

Manny vs Shane is proof of nothing, as for Pacquiao vs. Mayweather, if it ever actually happens, I favor Pacquiao for one simple reason: these 2 are evenly matched, however, as good as Mayweather is, there's no substitute for being in the ring regularly, his inactivity will be his downfall.

Leonard came back after 3 years to beat Hagler and Jofre came back after more then a 3 year retirement following his loss to Harada and won about 15 straight and then beat Legra for his feather title at 37years of age. Eder was a bantam when he retired and Leonard a welter.

Different fights, different fighters, i'll say this, if Mayweather is able to convincingly defeat Pacquiao being as inactive as he's been, then he is in fact, one of the best of all-time.

I do not dispute that. I just do not agree with the conclusion you draw from the time off.