• Diablo Flag Football & Tackle League -- Registration open for 3-day winter tackle camp and spring flag football league in Brentwood and Oakley. Players ages 4-16 can sign up online at www.diablofootball.com or 925-625-2222.

  • East Bay Youth Sports -- Registration open for winter break flag football league fro boys and girls 5-12. 9 a.m.-noon on Dec. 23-31 and Jan. 2 and Jan. 3 in Concord at Woodside Elementary, and Orinda at Wilder Field. 925-952-4450, www.ebys.org

    BASEBALL

  • Clayton Valley Charter Clinic -- Taught by head coach Casey Coakley and staff. For boys and girls ages 5-14 on Jan. 2-3 from 9 a.m.-noon at Clayton Valley Baseball facility. $60. uglyeaglebaseball@gmail.com

  • Saint Mary's College Baseball Camp -- Registration open for two-day winter youth camp. For boys and girls, ages 5-12, on Dec. 21-22 from 9 a.m.-3 p.m. at Louis Guisto Field, Moraga. $225. nml3@stmarys-ca.edu, www.smcgaels.com

  • Saint Mary's College Baseball Camp -- Registration open for two-day winter high school prospect camp. For boys ages 13-18, on Dec. 28-29 from 9 a.m.-4 p.m. at Louis Guisto Field, Moraga. $299. nml3@stmarys-ca.edu, www.smcgaels.com

    Swimming

  • Brentwood SeaWolves -- Sign-ups for USA swimming and water polo. Boys and girls of all ages. 925-240-9653, www.brentwoodseawolves.com

    Wrestling

  • Pittsburg Wrestling Club -- Sign-ups for boys and girls, grades 3-12. Practices at Pittsburg High School every Tuesday and Thursday, from 6-8 p.m. Contact Tony 925-518-6756

    BASKETBALL

  • Warriors Basketball Camp -- Registration open for holiday skills clinic for boys and girls, ages 7-15. On Dec. 21 from 12:30-3:30 p.m. at Oracle Arena, 7000 Coliseum Way, Oakland. Participants also receive two Warriors tickets. 510-986-5310, warriors.com/camp

  • NorCal Courts Adult Drop-In-- Drop-In basketball for adults, on weekdays and Sundays. Monday & Wednesday from 9-11 p.m. Tuesday, Thursday, Friday and Sunday from 6-9 p.m. 360 Ferry St., Martinez. $5. 925-708-7929, www.norcalcourts.com

  • Winter Break Basketball Camp -- Register for Pleasant Hill Recreation Sports basketball camp for boys and girls, grades 3-8. Camp runs Dec. 30-31 and Jan. 2-3. Grades 3-5 from noon-1 p.m. and grades 6-8 from 1-3 p.m. $50 for grades 3-5 & $70 for grades 6-8. PH Education Center Gym, 1 Santa Barbara Rd. 925-682-0896, pleasanthillrecsports.com

  • Pleasant Hill Recreation and Park -- Pleasant Hill Recreation's Adult Drop-In basketball, every Friday at 5:30-7 p.m., and Sundays, 8-10 a.m. PH Education Center Gym, 1 Santa Barbara Road. $5. www.pleasanthillrecsports.com