• Pleasant Hill Baseball Association -- Spring season walkthrough 10 a.m.-1 p.m. Oct. 13 and 6-9 p.m., Oct. 24 and Nov. 7. For boys ages 4-18. Register online before the walkthrough. 2 Santa Barbara Rd. Pleasant Hill. $160. 925-933-7950, www.phba.org

  • Martinez Pony Baseball Club -- Fourth Annual Martinez Pony Free Baseball Clinic, 9 a.m.-noon, Oct. 27. For boys ages 9-12. 1765 Arnold Industrial Way, Concord. Free. 925-788-6504, 925-586-5036, tv40@att.net, sixabes@comcast.net

  • Martinez Bulldogs -- Tryouts by appointment for 12U Martinez Bulldogs Baseball Spring 2013 Team. Tesoro Fields, 1765 Arnold Industrial Way, Concord. 925-683-4973, Selliott356@att.net

  • Diablo Warriors -- Tryouts by appointment for the U14 Diablo Warriors travel baseball team. Ygnacio Valley HS, 755 Oak Grove Road, Concord. 925-671-7758, emanlaw99@hotmail.com, northrupmb@yahoo.com

    Ultimate

  • Bay Area Disc Association -- Contra Costa Ultimate Clinic, 2-4 p.m. Oct. 14 and Oct. 21. For boys and girls ages 14-18. Valley View Middle School, 181 Viking Place, Pleasant Hill. $10 per clinic. 925-946-0612,
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