With the rubber (or of any other material) ball fetching incredibly fast speeds, Below the belt injuries would be very painful if there is no protection - yatharthb
Baseball is a bat-and-ball game played between two teams of nine players each who take turns batting and fielding.
With ball speeds up to 100 Miles per hour, and unpredictable curve balls, it may badly hurt your balls - yatharthb
3 American Football
Association football, more commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball. The goal is to score the ball on the other team's goal.
5 Pole Vaulting
Gymnastics is a sport involving the performance of exercises requiring strength, flexibility, balance and control.
Tennis is a racket sport that can be played individually against a single opponent or between two teams of two players each.
Cricket is a bat-and-ball game played between two teams of eleven players on a cricket field, at the centre of which is a rectangular 22-yard-long pitch with a wicket, a set of three wooden stumps sited at each end.
Volleyball is a team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules.
Never under-estimate the force of Recoil - yatharthb