• Antioch Little League -- Registration for Antioch Little League 2013 season, 6-8 p.m. Dec. 5, 10 a.m.-2 p.m. Dec. 8, and online. For boys and girls ages 4-16. 3001 Delta Fair Boulevard, Antioch. 925-431-8478, www.AntiochLittleLeague.com

  • Pittsburg Little League -- Registration online for Pittsburg Little League 2013 season. $110-$150. 925-291-0107, www.pllca4.org

    SOFTBALL

  • Antioch Little League -- Registration for Antioch Little League 2013 season, 6-8 p.m. Dec. 5, 10 a.m.-2 p.m. Dec. 8, and online. For players ages 4-16. 3001 Delta Fair Boulevard, Antioch. 925-431-8478, www.AntiochLittleLeague.com

    Running

  • Pleasant Hill Recreation and Park -- 37th annual Turkey Trot 8.4 mile trail run, 9 a.m., Nov. 18. Briones Regional Park. $20 before Nov. 14, $25 day of registration. 925-682-0896, www.pleasanthillrecsports.com

    Football

  • Delta Patriots Football -- Delta Patriots Youth Football and Cheer registration online. For boys and girls ages 5-14. 5641 Lone Tree Way, Brentwood. $425 for football, $545 for cheer. 925-626-3737,
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