The Buffalo Bills' backfield has gotten a tad crowded.
Fred Jackson, C.J. Spiller and Ronnie Wingo are back. They added free agent Anthony Allen in January and free agent Anthony Dixon in March.
Eagles star LeSean McCoy wished his backfield mate farewell with a Twitter comment that didn't sit well with Jackson.
Jackson and Spiller are former 1,000-yard runners who combined to rush for 1,823 yards and 11 touchdowns. The Bills ranked second in the NFL in running offense at 144.2 yards a game.