Buffalo Bills Offensive Formations Singleback Ace Pair Bunch Ace Deuce Close Dice Slot Doubles Y Off Close Wing Pair Wing Slot Wing Tight Y Trips I Form Pro Slot Tight Z Close Pistol Open Flex Close Shotgun Bunch Empty Base Flex Empty Y Slot Normal Y Off Normal Y Off Close Normal Y Off Wk Split Slot Open Spread Tight Trey Y-Flex Trips HB Wk Trips TE U Trips Wk Y Off Trips Wk Strong I Z Close Weak I Pro Defensive Formations 4-3 Even 6-1 Over Over Solid Over Wide Under Nickel 2-4 Dbl Mug 3-3 Cub 3-3 Will Dime Normal Prevent 3 Deep Goal Line 5-3 6-2