On July 21, 1976, the Mets acquired outfielder Pepe Mangual from the Montreal Expos along with Jim Dwyer in exchange for Wayne Garrett and Del Unser. That same day Mangual made his Met debut as their starting centerfielder and leadoff hitter and went 1 for 4. Over his next two games he went 4 for 8 with 5 RBIs, but that was the highlight of his season for the Mets as he struggled the rest of the way. He appeared in 41 games and batted just .186 with a home run and 9 RBIs. His only home run came during the last game of the season.
Mangual spent the 1977 season in the minors with the Tidewater Tides where he hit .252 before getting called up in September. He played in 8 games for the Mets and batted just .143 (1 for 7) with 2 RBIs.
In 1978, he returned to the minors where he spent half the season with Tidewater before moving on to the California Angels organization. In 49 games for the Mets over two seasons Mangual batted .183 with a home run and 11 RBIs.
While with the Mets Mangual wore number 11 in 1976 and 21 in 1977.
Pepe Mangual also played for the Montreal Expos from 1972-1976.