I'm not sure that it has been identified as an issue that has effected him adversely. Finely tuned athletes blow hamstrings. Finely tuned athletes foul balls off of their body parts. Finely tuned athletes have been considered injury prone from nagging to chronic. When it happens to Byron Buxton it can't be tied to weight so it never is but when the same thing happens to Sano... it seems that some just reach for the easy button and call it case closed. . I'm concerned that many make natural assumptions based on his weight, fixate on those assumptions and then leap to conclusions drawn from those assumptions. To be fair... it would also be an assumption to assume that weight isn't effecting him but I'm not aware of anything that clearly connects the dots from his size to performance. I watch him move... he can move. He isn't slow, he moves decently to his left and right, he gets down on grounders, he has a rocket arm, he hits the ball hard. He's 24 years old... 24 year old's can eat Styrofoam and process it. They can carry that weight but yeah... that will most likely change incrementally when his metabolism starts slowing down. Then it becomes a Beatles song... "Boy... you're gonna carry that weight... carry that weight a long time". It would be best for him over the long haul to get things under control but he's 24... I don't think he's on some sort of health cliff yet. His plate discipline on the other hand... that's what fell off the cliff at age 24. I'd like to see him spend some time in the film room, I'd like him to focus on contact and start a personal war against striking out. I have a suspicion that if stopped chasing crap that he just might explode into something we like watching.