Source: Josh Katzowitz, CBS Sports 
The signs of Jared Allen spending his last season in a Vikings uniform have been evident for much of the year. Minnesota reportedly tried to trade him before the deadline, and he apparently at one point wondered if this was the worst defense on which he’d ever played.
The Vikings defensive end, at the age of 31, is still serviceable with five sacks this season and a No. 25 ranking (out of 51 players) on the Pro Football Focus list of 4-3 scheme defensive ends.