Hagerstown once again changed affiliates in 2005, initiating a two-year stint with the New York Mets. In June, the Suns qualified for the playoffs in dramatic fashion. Pitcher Gaby Hernandez's 115–pitch no-hitter in a 1–0 win over the West Virginia Power on June 19 set up a one-game playoff between the Suns and Lexington Legends on June 25 for the first-half crown. Both teams completed the first–half regular schedule with 42–28 records. In the one game playoff, the Suns defeated the Legends, 9–4, with Hernandez again taking the mound and the win. The Suns slumped badly during the second half of the season, finishing last in the Northern Division. In September however, Hagerstown won the Northern Division by defeating the second-half Northern Division champion Delmarva Shorebirds two games to one. The Suns were ultimately unsuccessful in their quest for the South Atlantic League championship, losing to the Kannapolis Intimidators, three games to one.