What is the average NFL life of:

[laram0]

QB
RB
FB
TE
OT
OG
C
WR
DE
DT
LB
CB
Safety

How many years and at what age do the players at each position usually play until?

[RamOfDenmark]

I wasn't able to find any reliable numbers (I looked around a little) but I'm pretty sure RB would be the position where players retire the youngest, it's definitely a position where your body takes a lot of punishment. I would say most of the other positions apart from RB I've seen players play very well in up to around their mid-thirties. Would be interesting to see some numbers if anyone else was able to find them.