Billy Witz for The New York Times:

If Frazier, a top outfield prospect for the Yankees, played for most any other team in baseball, his hair would be embraced in all its flaming glory.
But with the Yankees, Frazier’s hair has brought unwelcome attention. In short, the Yankees do not do big hair (or beards), under a policy set years ago by George Steinbrenner and vigorously policed by his daughter Jennifer. Now there is a guessing game over whether the team will send Frazier to the barber before sending him to the plate.

Tradition is tradition. If you are a Yankee, you have short hair and a trimmed beard. It’s not like you can deny the Bronx Bomber success during Steinbrenner’s tenure.