I guess the issue is that if he was 312 last year and dropped under 290, then this year at 305 he's going to drop under 285
Not exactly. I think we all know that the 312 he was at was inflated for the draft due to most likely binge eating/liquid retention. Now that his weight won't affect the bottom line of his contract/draft position he might be putting on solid muscle rather than flab. Of course he will lose some throughout the season but as far as I understand it is easier to retain muscle as opposed to fat.