The question was which sport take the most balls, not which is the most dangerous. If its up to death totals then Boxing,Mountain Climbing are both real high on the list. As for balls, I gotta go with MMA/FCF with Boxing being close behind. Rugby and Football and Hockey are rough sports, but they are team sports were you got others to look out for you. When you are in the Ring or Cage its just you, no where to run or no timeouts.