Sometimes, a player remains in the NFL for too long based solely on what he's done in the past.
Teams think he can regain his All-Star status and put up the same kinds of numbers he did when he was in his prime.
Sometimes, teams get lucky (Brett Favre with the Minnesota Vikings in 2009). Sometimes, they don't (Brett Favre with the Vikings in 2010).
Here's a list of five veterans that used to be stars who just don't have what it takes any more.
Their teams would be wise to cut ties with them before they start costing them regular season victories.