By Amanda Gardner
HealthDay Reporter

FRIDAY, June 20 (HealthDay News) -- Summer officially starts Saturday and, with it, Major League Baseball is gearing up to warn players and their fans of the dangers of skin cancer.

Major League Baseball, the Major League Baseball Players Association and the American Academy of Dermatology (AAD) are kicking off their 10th annual Play Sun Smart campaign on that day, which has been designated Play Sun Smart skin cancer awareness day.

THURSDAY, May 29 (HealthDay News) -- Knee injuries are the most common reason for high school sports-related surgeries, say researchers who analyzed data on nine high school sports at 100 U.S. high schools.

The sports included were boys' football, soccer, basketball, baseball and wrestling, and girls' soccer, volleyball, basketball and softball.