At least two Yankees numbers have not been formally retired, but have been kept out of circulation. The New York Yankees have not re-issued Paul O'Neill's #21 since he ended his career at the end of 2001, except for a brief period of a few days in 2008 when Morgan Ensberg and then LaTroy Hawkins wore #21, before fan complaints led Hawkins to change his number to #22 in April. Additionally, the Yankees have held Alex Rodriguez's #13 out of circulation since his retirement in 2016.