I think Sano playing at 285 when he's 30 is a valid concern like Souhan writes. Athletes physical abilities begin to decline around the age of 26 or 27. He may do just fine. His experience may even make him better. However there aren't a lot of MLB players in their mid to late 30s. Besides the whole point is that according to Souhan some people in the Twins organization are concerned. They should be. Sano will be making millions and millions of dollars whether he can maintain a high level of performance or not.