When the New York Yankees acquired Austin Slater to fill half of an outfield platoon, it helped thicken the bench and provided the Yankees an extra body amid Aaron Judge's doom-incurring injury. It also created some excess if Judge wasn't done for the season, especially after they'd also brought on Amed Rosario. The Yankees turned Oswald Peraza's bench spot into a player with minor-league options, but there still wasn't enough room for Judge/Slater/Rosario at the same time, unless they wanted to play a pitcher short.
As it turned out, the corresponding move for Judge's swifter-than-expected return was .