Reports: Mets Add Mariano Duncan To Coaching Staff

When the New York Mets removed the interim tag from manager Andy Green's title and made him the full-time boss on Sept. 22, all indications were that the in-dugout coaching staff would be retained, including bench coach Kai Correa, hitting coach Troy Snitker, assistant hitting coach Rafael Fernandez, pitching coach Justin Willard, assistant pitching coach Daniel McKinney, first-base coach Gilbert Gomez, third-base coach Tim Leiper, bullpen coach Jose Rosado and catching coach J.P. Arencibia.

That, however, didn't mean that the Mets wouldn't add a name or two to the coaching staff.

Though it is still unconfirmed by the team, multiple reports on Monday indicated that 13-year MLB veteran Mariano Duncan would be joining the parent club in the newly created role of "Major League coach," according to Anthony DiComo of MLB.com.

Duncan's specific role remains nebulous, with the New York Post's Joel Sherman reporting on Monday via Yahoo Sports that he is "expected to assist in multiple areas with the position player group."

Duncan earns the promotion to the big club after spending the previous eight seasons in a variety of minor-league coaching positions in the organization, with the past five years serving as Double-A Binghamton's bench coach. In that capacity, he helped guide the Rumble Ponies to the 2025 Eastern League championship.

The list of players that Duncan helped coach at Binghamton includes catcher Francisco Alvarez and outfielders Carson Benge and A.J. Ewing, all of whom figure to be foundational pieces for the Mets in the coming years with Benge and Ewing recently named to MLB.com's 2026 All-Rookie Teams.

In addition to his player-development role with the Mets' minor-leaguers, Duncan did compile some major-league coaching experience as the first-base coach for the Los Angeles Dodgers from 2006-10. He has also worked as a minor-league hitting instructor for the Dodgers', Chicago Cubs' and Detroit Tigers' organizations.

As a player, Duncan, 63, who broke in with the Dodgers in 1985 and played for five different teams, was known for his positional versatility. He was most commonly a second baseman or shortstop, but he did have seasons where he played significant numbers of games in leftfield, and at first and third base.

At the plate, he was a .267 career hitter with a .688 OPS in 1,279 games played. He finished with 233 doubles, 37 triples - leading the NL with 11 in 1990 - 87 home runs, 491 RBIs and 174 stolen bases.

He was a member of the 1990 Cincinnati Reds team that recorded a shocking four-game sweep of the Oakland A's in that year's World Series. He added a second World Series ring to his collection with the 1996 New York Yankees, a season in which he fashioned career highs in batting average (.340), OPS (.852) and WAR (2.7) in 109 games. He retired after a 1997 season split between the Yankees and Toronto Blue Jays.