Event: Best of the Best 18-and-under baseball tournament. Dates: Dec. 12-14, 20-21. Site: Orange County high school fields. Fee: $350 per team. Basics: Youth baseball teams invited to enter. Players must not had turned 19 before Aug. 1. Picture identification and birth certificate required. For information: Nelson Frappier-Fortier, (714) 730-9154.
Event: Make-a-Wish Foundation charity golf tournament. Day: Monday Time: 9 a.m. registration, 10 a.m. start. Site: Coyote Hills Golf Club, Fullerton. Fee: $250. For information: (310) 664-4250.
Event: Volleyball clinic with Pat Powers, USC men's coach. Day: Sunday, Sept. 28. Time: 9 a.m.-5 p.m. Site: Irvine Sport Center, 15041 Bake Parkway #F. Fee: $60 for advance reservations. Basics: Powers, who played for the gold medal-winning 1984 U.S. Olympic team, will conduct clinic for junior and advanced players. It will feature tips to improve hitting, ball control, blocking and jump serving. Fee for advance reservation includes a Mikasa volleyball. For information: Pat Powers, (213) 740-3838.