People are overthinking this. If an MLB player is sent to Ft Myers, that means there is probably something going on that doesn't involve swinging a bat at a baseball. Ft Myers is the Twins' home away from home. It's where the Twins have their primary training and medical facilities and where everyone goes to rehab. That doesn't mean Sano is injured; they could be concerned about his diet, training, or mental state, amongst other things. But it's highly unlikely this is purely an on-field baseball decision. Otherwise, Sano might get slapped down to Chattanooga at most. He won't learn much, if anything, against Florida League pitching.