Powerlifting would've been the sport. Hoffman disliked Weider style bodybuilding that focused on looks. His pet sport of Olympic Lifting was fading as a sport, as more young men were going into Powerlifting, as it was slightly easier due to the less technical nature of the lifts.
Grimek, and younger lifters similar to him would've still been the poster boy for the well muscled man in Hoffman's mind.