Tommy John - 26 seasons
Phil Niekro, the knuckleballer.
Nolan Ryan.
Nolan Ryan
Nolan Ryan
Cy young had both wins and loses ...
Hoyt Wilhelm and John Franco, each recording at least 1 save in 19 seasons. Franco played for 21 seasons (1984-2001, 2003-2005) and failed to record a save in 2004 and 2005. Wilhelm played for 21 seasons (1952-1972) and failed to record a save in 1955 and 1959.
Ed Kranepool holds the record for playing the most seasons with the Mets, having played 18 seasons with the team from 1962 to 1979.
Nolan Ryan (27 seasons)
As of the 2008 season, that would be George Blanda who played 26 seasons (1949-1958, 1960-1975). Kicker Morten Andersen has played 25 seasons (1982-2004, 2006-2007) and should he come back this season, he will tie Blanda for the most seasons played.
Jesse orrosco or rickey Henderson
One of the most wholesome shows on television......I believe the Waltons played for 9 seasons.