Osvaldo Martínez may refer to:
Osvaldo "Ozzie" Martínez (born May 7, 1988) is a Puerto Rican professional baseball shortstop in the Baltimore Orioles organization. He has played in Major League Baseball (MLB) for the Florida Marlins.
Martínez was drafted by the Florida Marlins in the 11th round of the 2006 Major League Baseball Draft out of Porterville College. He was called up to the Majors for the first time on September 19, 2010, walking in his one at-bat as a pinch hitter. The following day, he started at shortstop for the Marlins against the St. Louis Cardinals and recorded his first hit, a single to center field off Chris Carpenter. He appeared in 14 games for the Marlins in 2010 and another 20 in 2011, with a combined batting average of .258.
Martínez and Jhan Mariñez were sent to the Chicago White Sox on September 29, 2011 as compensation for the hiring of Ozzie Guillén by the Marlins, as Guillen had one year remaining on his contract with the White Sox.