The days of drinking beer all summer and showing up to camp to get in shape ended years ago
White is listed at 5 foot 11 or 6 feet and the lightest weight i can find is 183. He's not small per se but he's not built like a tank either
You see guys employ different training strategies and diets all the time. For example there was a good story with Boro about two months ago talking about playing at 220 versus 205.
I don't think it's the case that White didn't train at all. I think it's more the case that strength is a noted deficiency so we'll see a customized program for him this summer to address that.
I see other weaknesses that need to be addressed in his game: speed, puck handling, passing, shooting. White is not a first or second line center or player because his skill set is average.