No one. The last to wear it was Mariano Rivera.
Mariano Rivera still wears # 42. He is the last player in the league who will ever wear the number.
CC Sabathia is number 52Derek Jeter is number 2
No Yankees player currently wears number 40.
Currently, Yankees closer Mariano Rivera wears number 42. Mariano is the last day to day player to wear that number in Major League baseball, and upon his retirement or change of number, will be the last to ever wear the number 42.
In the 2009 MLB season, only Mariano Rivera of the New York Yankees wears #42.
Currently, no player wears #21 for the Yankees.
Currently, no Yankees player wears #14.
Currently, Eric Chavez wears #12 for the Yankees.
Russell Martin currently wears #55 on the Yankees.
Brett Gardner currently wears number 11 for the New York Yankees.
Mark Teixeira wears number 25 for the Yankees.
Currently, there is no player on the Yankees that wears the #12.