Right-handed pitcher Walt Terrell was acquired from the Texas Rangers along with Ron Darling in exchange for Lee Mazzilli on April 1, 1982. The Mets immediately sent him to the minors where he spent the 1982 season pitching for the Tidewater Tides. In 21 games for the Tides Terrell posted a 7-8 record before being promoted to New York as a September call up. He made his Major League debut on September 18 against the St. Louis Cardinals; he allowed four runs over 6 2/3 innings and suffered the loss. He made two more starts for the Mets but lost both of them to finish out the season 0-3 with a 3.43 ERA.
Terrell returned to Tidewater to start the 1983 season, but after going 10-1 in 12 starts for the Tides he was promoted back to the Mets in the middle of June. In his first start for the Mets on June 20 Terrell earned his first big league victory. He finished out the season with the Mets and posted an 8-8 record with a 3.57 ERA. The highlight of his season came on August 6 at Wrigley Field vs. the Chicago Cubs, not only did he earn the victory by allowing just one run over 7 1/3 innings he also hit two home runs to account for all the Met scoring. In doing so he became the first pitcher in Met history to hit two home runs in a game.
Terrell spent the entire 1984 season as a member of the Mets starting rotation. In his first full season in the big leagues he pitched to mixed results. In 33 starts Terrell posted an 11-12 record with a 3.52 ERA. He did pitch three complete games with one shutout which came on June 5 against the Pittsburgh Pirates.
With the emergence of young stars Dwight Gooden, Ron Darling and Sid Fernandez Terrell became expendable and was traded to the Detroit Tigers for infielder Howard Johnson during the off-season.
With the Mets Walt Terrell posted a 19-23 record with a 3.53 ERA.
While with the Mets Terrell wore number 49.
Walt Terrell also played for the following teams:
Detroit Tigers – 1985-1988, 1990-1992
New York Yankees – 1989
San Diego Padres -1989
Pittsburgh Pirates – 1990