because both players know this defensive system and Gregg Williams their transition in DC compared to a lot of the other free agents is going to be smoother and their impact more immediate. that's why the Redskins refused the Denver trade that would have netted Al Wilson instead of Fletcher.
inside linebackers are not shot at 30. there seems to be an opinion here that all players at all positions can be lumped in together and that magic age of 30 comes equally into play when evaluating each FA. not true.
running backs age quickly due to the weekly pounding they take. rarely do you see runners productive into their 30's. often what you see is a guy like Corey Dillon that has a big season at 28/29 and then starts to break down and fails to get back to 1,000 yards in subsequent seasons.
cornerback is another position where it is the rare player that is able to keep up with the speed of the game at 33 or 34.
but quarterbacks, linemen and inside linebackers from what I have seen often have a longer shelf life in the NFL.
Fletcher's 31 is not the same then IMO as Corey Dillon's 31.
that is the false correlation that Pete Prisco tried to make this week in evaluating the free agent signings.
he focused on Fletcher's age and not his record of durability and continued productivity.