The largest number of game-ending injuries in a football (and by football we mean soccer) match occurred in 1998 during Bena Tshadi-Basanga, in the Democratic Republic of Congo, when a lightning bolt struck the pitch and killed all the 11 players of Bena Tshadi. The other team left the field unscathed, and heavily accused of witchcraft.
Grim Reaper's Little Helper 