Carlos Antonio Diaz (January 7, 1958 – September 28, 2015) was an American Major League Baseball relief pitcher.

Despite a career earned run average of 4.22 in the M's farm system, in 1981, he managed to bring that down to a far more respectable 2.81 his first season with the Richmond Braves.

The Braves, who won the National League West that season, came back to score four runs in the bottom of the inning to give Diaz his first career win.

Following the season, he was traded to the Los Angeles Dodgers with Bob Bailor for Sid Fernandez and Ross Jones.

Diaz had a perfect career fielding percentage until the 12th inning of a fourteen-inning marathon against the San Diego Padres on June 21, 1986.