3.52 years
Including all player positions, the average NFL career is four seasons.
How long is there career? After that point,well ya,were is Jeff Reid? Go PiTT
8 to 11 years
http://findarticles.com/p/articles/mi_m0EPF/is_15_100/ai_69200966
"There is a little bit of a misrepresentation or a misunderstanding on that. Frequently, it is said that the average career is about 3.5 years. In fact, if a player makes an opening day roster, his career is very close to six years…If you are a first-round draft choice, the average career is close to nine years. That 3.5-year average is really a misrepresentation. What it adds is a lot of players who don't make an NFL roster and it brings down the average."
wel a career cluster an nfl player could have is mabey the player is traded to a differeant team and does not get paid enough money.
as many as you like their is no limit the average player however will have an 8 to 14 year career with exceptions of course
jerome bettis
1000 years
Not sure
The professional life of an NFL quarterback is short. The average length of an NFL quarterback's career is only 4.4 years.
Rod Woodson with 13 career touchdowns.