Because that's something you can just do with no repercussions. Is it? Because who the hell knows, assuming the player is down with it. As I recall, a few years back when Zack Greinke came out with his social anxiety disorder, and suddenly underpermforming players such as Dontrelle Willis and Milton Bradley were coming out of the woodwork saying "oh yeah, I have that too," there was debate (I believe S.I.) over whether or not a seperate DL for "mental breaks" should be a thing. Maybe it should be. Cripes. No, I was being sarcastic. Starlin isn't going to agree to a phony injury to be shut down for 2 months in a playoff race so that someone younger and cheaper can take his job, thus ending his season with the worst numbers of his career.