In almost every season, Chet Holmgren would be leading the RoY race (which he briefly did about 2 months ago). This season, Wemby pretty much has it locked up already as long as he plays the required 65 games.
Muscle will come naturally with weight training and age. Wemby plays like a “wing” so I figure he’d actually be less effective at 275 pounds. Look at Zion Williamson. For all of his natural athleticism and leaping ability, his excess weight is a huge problem at such a young age. Zion would still be a wrecking ball at 255.