Signed by the Kansas City Royals as an amateur free agent in 1993. Has played for the San Francisco Giants (1998-2002), Chicago Cubs (2003-2004), Detroit Tigers and Philadelphia Phillies (2005).
(July 24) Released by the Los Angeles Dodgers.
Infielder for the Los Angeles Dodgers.
Re-signed with the New York Mets to a minor league contract. Martínez hit .250 with 4 hits in 7 games for the Mets in 2008.