Major league debuts are memorable for every player that gets one. However, they also aren’t any sort of long term predictor of success. Plenty of players that went on to have short and less than stellar MLB careers had solid first games, and plenty of great players have had bad ones.
As far as memorable Yankees’ debuts, it’s hard to look past Aaron Judge’s where he hit a towering homer in his first ever MLB at-bat. On the other end of that spectrum is Whitey Ford’s debut in 1950.
Signed by the legendary scout Paul Krichell, Ford entered the Yankees’ system before the 1947 season and began to work his way through the organization.