Long, 25, came to the Chiefs on Sept. 16, 2009 and was placed on the practice squad before being activated in week seven.
Expectations for Long in Kansas City were slightly inflated when, in his second game as a Chief, he caught eight passes for 75 yards. He didn't have another game in the 2009 regular season or the 2010 preseason where he caught more than two passes in a game.
Long was originally brought to Kansas City because of his familiarity with Todd Haley while with the Arizona Cardinals in 2008.
The Chiefs are now down to 75 players before the 3:00 p.m. (CDT) deadline.