The Mets' opponent in the 1973 World Series was the Oakland A's. Jon Matlack, who had already started 35 games (34 regular season, 1 postseason) was called upon to start Game 1. In doing so, he became only the fourth pitcher in major league history to start a World Series opener with a losing record (14-16) during the regular season.
The other pitchers to accomplish this rare feat were Alvin Crowder (9-11 with the 1934 Detroit Tigers), Denny Galehouse (9-10 with the 1944 St. Louis Browns) and Don Drysdale (13-16 with the 1966 Los Angeles Dodgers). Matlack pitched well, but took the loss as the Mets' bats remained silent in the 2-1 defeat.