In the NFL, players age quickly and their production dies swiftly.
It's even more brutal in fantasy football.
For example, look at Shaun Alexander, one time Seattle Seahawks running back and fantasy stud.
After a tremendous 2005, where he ran for 1,880 yards and amassed a staggering 27 touchdowns, Alexander regressed almost immediately.
He got hurt, missed even the 1,000 yard mark over the next two years and saw himself released and struggling to catch on in Washington.
As fast as the Seahawks dropped him, fantasy owners did it faster.
It's usually a better idea to be a year ahead of the curve than a year behind on a fading player.
With that in mind, here are some players who have been great fantasy performers in the past, but will be dropping off the map over the next few years.