The Mets acquired Del Unser from the Philadelphia Phillies along with John Stearns and Mac Scarce in exchange for Tug McGraw, Don Hahn and Dave Schneck on December 3, 1974.
A steady and reliable hard-nosed player Unser quickly became a fan favorite as the Mets everyday centerfielder. After hitting .300 for most of the season he finished the season with a .294 average, the highest on the team. He also hit 10 home runs and drove in 52. His best day of the season came on July 29th; he went 4-6 with three RBIs.
Unser returned to the Mets in 1976 but struggled at the plate. With his average at just .228 the Mets traded him to the Montreal Expos in the middle of July. He was traded with Wayne Garrett in exchange for Pepe Mangual and Jim Dwyer.
In his one and a half seasons with the Mets Unser hit .271 with 15 home runs and 78 RBIs.
While with the Mets Unser wore 25.
Del Unser also played for the following teams:
Washington Senators – 1968-1971
Cleveland Indians – 1972
Philadelphia Phillies – 1973,1974, 1979-1982
Montreal Expos – 1976-1978