It would be a dishonor to do this ranking and not acknowledge those who did not make the cut, especially since many Mets pitchers over the years have done quite well.
In the 1970s, Jon Matlack won the 1972 NL Rookie of the Year with 15 wins and a 2.32 ERA. He became a fixture in the rotation through 1977. Later in the decade, Craig Swan became the Mets' ace, led the National League with a 2.43 ERA in 1978 and won 14 games a year later.
The 1980s were full of great pitching seasons from various players. Ron Darling was one of the most consistent pitchers from 1984-1989, highlighted by 15 wins and a 2.81 ERA in 1986, plus 17 wins and a 3.25 ERA in 1988.
Sid Fernandez was another dominant pitcher for the Mets in the 1980s. His best season was in 1989, with 14 wins, a 2.83 ERA and 198 strikeouts.
The Mets' pitching for most of the 1990s was not as solid, but then again, neither were most of those teams.
The one notable exception though was the 1994 season Bret Saberhagen had. Unfortunately, it was cut short due to the players' strike, but in by far his best year as a Met, Saberhagen won 14 games, had a 2.74 ERA and finished with a remarkable 143/13 strikeout-to-walk ratio.
The Mets' most consistent pitcher of the mid-1990s was Bobby Jones, who had double-digit win seasons in each year from 1994-1997. His best year was his career high 15-win season in 1997. He made his first and only trip to the 1997 All-Star game and struck out both Mark McGwire and Ken Griffey Jr. in his lone inning of work.
Also, in 1997, former replacement player Rick Reed surprised everyone by winning 13 games and finishing with a 2.89 ERA that was sixth in the National League that year. Reed followed that up with 16 wins and an All-Star Game appearance in 1998 and became another cog in the 1999 and 2000 Mets rotations.
Jones and Reed, though, were comfortable with not being high-profile aces because beginning in 1998, Al Leiter filled that role very well.
He won 17 games and had a 2.47 ERA in his first year as a Met. He then never won less than 10 games in any season through 2004. His 16 wins in 2000 led the Mets to the World Series, while his 15 wins in 2003 accounted for nearly one quarter of the Mets' total wins that year.
Aside from Leiter, the 2000s did not feature very many great pitching seasons. Steve Trachsel was surprisingly one of the more consistent pitchers of the decade. He made up for one-quarter of the Mets' total wins in 2003 with 16 of his own. He then won 15 games in 2006 to help lead the Mets to their most recent division championship.
Only two other pitching seasons stood out in the decade. The first was Pedro Martinez's 2005 season. He won 15 games and had a 2.82 ERA that year. The second that stood out was Johan Santana's 2008 season.
After an average start at best, Santana had an amazing second half that was capped with a complete-game shutout on the second-to-last day of the season. He won 16 games and had a 2.53 ERA that year.
As for Tom Glavine, he had some good years with the Mets, but they were never up to par with the Cy Young seasons he had in the 1990s with the Atlanta Braves.
The Mets have had numerous great individual pitching seasons, and these were just the honorable mentions.