The American Football League, established in 1959, played a total of ten fourteen-game seasons, 1960 through 1969.  Only twenty players were on AFL rosters for each of those ten years.  Three: Tom Flores; Jack Kemp; and Paul Lowe missed one season for various reasons, but were in the league for all ten years.  At a variety of positions, and with varying skills, many became AFL All-Stars, All-Time AFL players, and Hall of Famers.