Cap Anson and Nolan Ryan each played for 27 seasons. Cap from 1871 to 1897 and Ryan from 1966 to 1993.
(see Baseball-reference.com's article "Most Seasons Played"
http://www.baseball-reference.com/leaders/leaders_most_seasons.shtml )
Carl Yastrzemski holds the record for most career games played with the Boston Red Sox with 3,308.
There are many players in the NFL that currently hold records. Records are often broken. As of July 2013 George Blanda holds the record for the most seasons played. He also holds the record for the most decades played.
Nolan Ryan.
Nolan Ryan
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.
sanfrancisco
Walter Payton
The Dallas Cowboys
Rickey Henderson in 25 straight seasons!! Ty Cobb in 24 seasons
MLB: That would be 23 seasons by Brooks Robinson of the Baltimore Orioles (1955-1977) and Carl Yastremski of the Boston Red Sox (1961-1983) == ==
Brooks Robinson of the Baltimore Orioles (1955-1977) and Carl Yastrzemski of the Boston Red Sox (1961-1983) with 23 seasons for the same team.
Texas
Darrell Hammond