Oops. The Moon trade was for Gino Cimolli
Yes, but they made another deal to make room for him.
Prior to the 1954 season, Moon’s rookie year, the Cardinals traded Hall of Famer Enos (Country) Slaughter to the Yankees to make room for Moon.
Slaughter was near the end of his career, but was still effective enough to help the Yankees.
That is the trade that is referred to.