John Maine is a starting pithcer for the Mets who played here since 2006 after being traded to the Mets.On July 24, 2007, in the bottom of the 4th inning against the Pittsburgh Pirates, Maine hit a 2-run home run to left field and received a curtain call. This was his first home run of his major league career. The Mets won 8-4, and Maine earned his 11th win of the season. Maine earned his Met-leading 12th victory against the Nationals on July 29, pitching a complete game shutout in a five inning rain-shortened game, giving up only a single hit.
In January, the Mets avoided arbitration, signing Maine to a one-year, $2.6 million contract. Maine initially struggled coming off the shoulder surgery, posting a 5.40 ERA to go with a 1–2 record in four April starts. However, he bounced back in his six starts in May, going 4–1 with an ERA of 2.75, nearly half of his April ERA. After a poor start in June, he was placed on the 15-day disabled list due to arm fatigue. Maine would stay on the DL with arm fatigue and numerous setbacks for a long amount of time. He eventually came back in mid-September and was eased back into the rotation, going more than 5 innings only once. In his last start of the season against the Astros, he went 7.0 innings letting up one earned run with 7 strikeouts, with that encouraging start he gave the Mets more certainty that he can return to his '07 form in the 2010 season. He finished the 2009 season with a 7-6 win/loss record throwing 81.1 innings with an era of 4.43.