Jackie Robinson's number (42) was retired across MLB on 4/15/1997. The only player still wearing that number is Mariano Rivera. How has Rivera fared on that anniversary, now called "Jackie Robinson Day?" Not so hot. Not only has he blown three saves in as many opportunities, but the Yanks are 3-6 on those days:

1997 LAA (1IP, 3H, 2ER) L 6-5
1998 LAA DNP W 6-3
1999 BAL (1IP,3H, 2ER, 2BB) L 9-7
2000 KC DNP W 7-1
2001 BOS DNP L 5-4
2002 BOS DNP L 4-3
2003 TOR DNP W 5-0
2004 no game scheduled
2005 BAL DNP L 8-1
2006 MIN (3H, 2ER, 2K) L 6-5

Of course, the best way for a Yankee to honor a Brooklyn Dodger would be to lose, I suppose.