Prior to 2010, running back Willie Parker was the last Steelers player to wear #39. He wore it from 2004-2009.
Currently, Alex Rodriguez wears #13 for the Yankees. The last player to wear it prior to Alex Rodriguez was Jim Leyritz, and prior to him Mike Pagliarulo.
Currently, punter Drew Butler wears #9 for the Steelers. Prior to Butler, Daniel Sepulveda wore #9 from 2007-2011.
Prior to Derek Jeter in 2011, that was Craig Biggio of the Houston Astros in 2007.
Mariano Rivera is the current player and will be the last player on the Yankees to wear number 42. The number was retired throughout baseball in honor of Jackie Robinson. The players who were wearing that number when it was retired were allowed to keep it.
Bill Terry of the New York Giants with .401 in 1930.
Offensive lineman, Ryan Lee, wears #69 for the Steelers. He is currently on the practice squad. Prior to Lee, Jamon Meredith wore #69 in 2011.
Currently running back Isaac Redman wears #33 for the Steelers. Prior to him, running back Gary Russell wore the #33 in 2007 and 2008.