I'd bet it's a perception... I think it's the combination of no talks of an extension and the other corner OF just signed one, and the fact that Kiriloff, Larnach, and Rooker are coming up and haven't been traded away. The way things it going, it appears Rosario isn't going to be here past 2021... emphasis on "appears". Rosario is a player with high highs and very low lows... he'll get you somewhere between 1.5 to 3 WAR in a given season, and he can be a great clutch hitter and has a great arm to throw out runners with, but all the crazy strikeouts, refusal to take walks, and airmailed throws into the infield drag down his value, not to mention that recently his defensive abilities have waned. For a team which has its core aging up and getting more expensive, it makes sense to transition LF to one of the prospects, but that doesn't mean we have to kick Eddie out the door. I'd wager on him getting tendered next year and then hitting free agency in 2022.