Eric Anthony Duncan (born December 7, 1984) is an American former professional baseball second baseman coach.

Duncan attended Seton Hall Preparatory School in West Orange, New Jersey.

[4] Duncan spent the 2009 season with the Triple-A Scranton/Wilkes-Barre RailRiders, he played in 95 games and batted .204/.242/.285 with four home runs and 24 RBI.

On March 12, 2011, Duncan signed a minor league contract with the Colorado Rockies that included an invitation to spring training.

[9] Duncan signed a minor league contract with the Kansas City Royals on November 16, 2011, and was assigned to the Double-A Northwest Arkansas Naturals.

[12] In 2015, the Staten Island Yankees named Duncan as their hitting coach, he returned to the same position in 2016.