Félix Heredia Pérez (born June 18, 1975) is a former Major League Baseball relief pitcher. On October 18, 2005, he became the 11th MLB player to be suspended for testing positive for steroids. He is also known as "El Gato Flaco" (Skinny Cat in Spanish) and, "The Run Fairy" (a nickname sarcastically lampooning his poor performances in the latter part of his career). Heredia is married with three children and resides in Santo Domingo, Dominican Republic.