This isn't to include minor differences like Henry/Hank, but the relatively few players who have played as professionals under more than one distinct name. Here's what I have:
** Updated the baseball list to include comments in this thread, not including nicknames **
Harry Rasmussen >> Eric Rasmussen
Jose Gonzalez >> Jose Uribe
Joey Belle >> Albert Belle
Ismael Valdes >> Ismael Valdez
Sandy Martinez >> Angel Martinez
David Arias >> David Ortiz
Ramon A. Martinez >> Ramon Nivar
Deivis Santos >> Francisco Santos
Jairo Garcia >> Santiago Casilla
Manny Mateo >> Merkin Valdez
Leo Nunez >> Juan Carlos Oviedo
Eny Cabreja >> Wandy Rodriguez
Johan Santana >> Ervin Santana
Fausto Carmona >> Roberto Hernandez
Luis Valdez >> Jairo Asencio
Mike Stanton >> Giancarlo Stanton
Dee Gordon >> Dee Strange-Gordon
Raul Mondesi >> Adalberto Mondesi
Felipe Rivero >> Felipe Vazquez
Trent Clark >> Trent Grisham
Jose Garcia >> Jose Barrero
Any others?
I'd be eternally grateful to anyone who can help me find a 1998 Bryan Braves (non-perforated) Kerry Ligtenberg and a 2000 Nabisco Albertson's Astros Chris Truby.
Last missing items in a 10,000-card "set."