Every pro that I've stepped on the ice with has had a massive trunk. One of their legs usually equals the entire lower body of a regular Sam.
I'd be shocked if Pete hasn't been focusing on lower body and core - that's the power centre for hockey. Traps, lats, pecks, bis and tris are secondary. Even junior 'B' kids focus on legs. Glutes, quads and hammies, that's where the money hits the dirt.
It's strength, not weight. Classic old school farm boy made of sinew, or the fire hydrant tank guy (aka - Crosby). The muscle beach guys are easy to play against, cause they can't move very well, and usually their centre of gravity is off cause they work upper body way too much.