José Dennis Martínez Ortiz, nicknamed "El Presidente", is a Nicaraguan former professional baseball pitcher. Martínez played in Major League Baseball (MLB) for the Baltimore Orioles, Montreal Expos, Cleveland Indians, Seattle Mariners, and Atlanta Braves from 1976 to 1998. He threw a perfect game in 1991, and was a four-time MLB All-Star. He was the first Nicaraguan to play in the majors.