Chief Yellow Horse (real name is Moses J. Yellow Horse)
http://www.baseball-reference.com/players/y/yelloch01.shtml
Creepy Crespi (real name is Frank Crespi)
http://www.baseball-reference.com/players/c/crespcr01.shtml
Garth Iorg (I don't know, it just makes me laugh)
http://www.baseball-reference.com/players/i/iorgga01.shtml
Razor Shines (real name is Anthony Razor Shines)
http://www.baseball-reference.com/players/s/shinera01.shtml
Van Lingle Mungo
http://www.baseball-reference.com/players/m/mungova01.shtml
Calvin Coolidge Julius Caesar Tuskahoma McLish (name includes an American President, a Roman Emperor, a Native American Tribal Council and a town in Oklahoma)
http://www.baseball-reference.com/players/m/mclisca01.shtml
Ethan Fagget (never made it to the bigs, but played minor league ball)
http://www.baseball-reference.com/minors/player.cgi?id=fagget001eth
Drungo LaRue Hazewood
http://www.baseball-reference.com/players/h/hazewdr01.shtml
Sixto Lezcano
http://www.baseball-reference.com/players/l/lezcasi01.shtml