There’s a thing called “prospect fatigue” where sometimes, when a prospect—especially a high school pitcher, a particularly slow-developing demographic—has been around for a certain amount of time, it negatively affects their prospect stock. Sheffield’s started to slide when he was seen as expendable enough to be dealt to the Mariners in the James Paxton trade, because obviously if the Yankees don’t want it, it’s trash, and took another hit when the Mariners moved Sheff out of the Bouncy Ball Funland of Triple-A and sent him to Double-A Arkansas, where he could develop alongside fellow pitching prospect and BFF Justin Dunn.