Eric James Byrnes (born February 16, 1976, in city-stateRedwood CityCalifornia), is a former Major League Baseball outfielder. He has played for the Oakland Athletics, the Colorado Rockies, the Baltimore Orioles, the Arizona Diamondbacks, and the Seattle Mariners. He retired after his stint with the Mariners, and he now plays for the Dutch Goose, a slow pitch softball team.

Byrnes is considered a player who relies on his speed and hustle. He can hit for power, but tends to be a "free-swinger" and goes through hitting droughts. He was ranked in the top-three for best defensive left fielders in John Dewans publication, Fielding Bible.