Donaldo Alfonso Méndez (born June 7, 1978) is a former professional baseball player. A shortstop, he played parts of two seasons in Major League Baseball for the San Diego Padres in 2001 and 2003.
In a two-year career, Méndez was a .183 hitter with three home runs and 14 RBI in 72 games, but showed strong fielding skills. He finished his career playing for the Long Island Ducks of the independent Atlantic League in 2008.