Check that math homey. Since 2012:
Cassel, MIN, BUF, KC (3)
Orton, DAL, BUF (4)
EJ, BUF (4)
Tuel, BUF (4)
Thad, CLE, BUF (5)
Fitz, BUF, TEN, HOU, NYJ (8)
In four years, the Bills could potentially start six QB's who--counting the Bills--will have starts with eight different teams.