They'll give Black another shot simply because he's quite possibly the hardest thrower in the system. The team will likely keep eight or nine relievers, and barring injury, five of those spots are likely spoken for with Hader, Williams, Suter, Peralta and Yardley. You have to think that Rasmussen and Topa are solid bets with good springs. Boxberger is going to be in competition with Black, Feyereisen, Wahl and Bickford. That will change even more if they decide that they need a 3rd lefty in the pen. Then Perdomo, Blaine Hardy, Hoby Milner, and Lauer (if he fails to make the rotation) come into play. And there's a complete wildcard in Jordan Zimmermann, who fits either as a back-end rotation guy or a long man if he shows enough in spring training. File and Bettinger are also on the 40-man roster, and will be given plenty of opportunity to see if they can contribute to the 2021 major league team at some point. Boxberger probably does stand a solid shot of making the MLB pen, but he's got a lot of competition, and is going to need to show well in spring training. The Bullpen battle is going to be really fun to watch this spring. Alot of good pitchers and then a couple really intruiging arms too