I guess he was in shape... Peter just naturally has that portly belly I guess? its why he cant get snap on straight punches... slim waists are good in boxing. Peter has good hooks and not the fastest straight punches which is part of the reason that he lost when you look at it from a purely physical matchup in a scientific view. To me he could've still lost a few pounds even for a heavyweight. Maybe he just has a naturally tank like body...not sure
Compared to the non efforts of Chambers , Chagaev and Sultan Ibragamov , I suppose Sam's willingness to be used as a heavy bag was noteworthy. At least Peter accepts a money fight for a title belt. Haye won't venture near any ring with a Klitchko in it.