I can see Pete is 170 when he was young since he was skinny. But no way he was the same weight after he bulk up and got stronger. Perhaps they never updated his profile.
Tier1(goat): Federer; Tier 1.5: Laver, Gonzales, Sampras, Nadal, Borg;
Tier 2: Lendl, Connors, Rosewall, Tilden; Tier 2.5: McEnroe, Agassi