from Gammons:
According to the Korean News Bureau, South Korean Doosan Bears' pitcher Park Myung-hwan twice lost his cap while delivering a pitch and each time frozen cabbage leaves fell off his head twice in a game on June 19. The frozen cabbage leaves inside the cap were used to keep his head cool.

The Korea Baseball Organization has been moved to rule that wearing cabbage leaves inside a baseball cap constitutes an "alien material" that may disrupt a game, prohibited according to the organization's rules, the organization said in a statement Tuesday.