Certainly a surprise on the first one.
Boone is an eight year veteran playing the last two with the Chiefs and the first six with the Bears. He previously played defensive tackle but was moved to end in the Chiefs 3-4 scheme.
Stay tuned as more cuts come in...
Update 12:56 PM: Courtesy of Bob Gretz:
There are 11 players not practicing with the Chiefs: QB Matt Cassel, WR Devard Darling, DE Alfonso Boone, WR Amani Toomer and OT Cameron Goldberg. Working in the rehab area are FS Jarrad Page, SS Bernard Pollard, ILB Zach Thomas, CB Brandon Flowers, TE Jake O'Connell and RB Kolby Smith.
Goldberg doesn't have an injury we're aware of so it's possible he's another one of the cuts.