9 players Justin Houston joined in the 20-sack club
DEC 15, 5:28p ET | Richard Calhoun
Rotowire: Mar 29 / 8:25p ET
News: Allen was diagnosed with a herniated disc in his back after the end of the 2014 season, Dan Wiederer of the Chicago Tribune reports.
Impact: Allen had a rough first season in Chicago, dealing with pneumonia, a rib injury and the back issue on his way to just 5.5 sacks. He should still be a key part of the defense in 2015, but with the Bears signing Pernell McPhee this offseason, Allen is in danger of losing some snaps.