The NCAA Injury Surveillance System reported data for the 2002-2003 Division I college baseball season. Twenty-eight schools submitted information. The data includes number of injured, number of exposures and injury rate for practices and games. The injury rate signifies the number of injuries per unit of participation or risk. It is a ratio of the number of injuries in a particular category to the number of athlete exposures. This value is expressed as injuries per 1,000 exposures. An athlete exposure and the unit of risk is one athlete participating in one practice or game where he or she is exposed to the possibility of athletic injury. For example, five practices with 60 athletes and one game with 40 athletes results in 300 practice exposures and 40 game exposures. So, three reportable injuries during 300 exposures result in a rate of (3/300) × 1,000 to equal 10 injuries/1,000 exposures.