Cal. Pen. Code § 337b
Any person who gives, or offers or promises to give, or attempts to give or offer, any money, bribe, or thing of value, to any participant or player, or to any prospective participant or player, in any sporting event, contest, or exhibition of any kind whatsoever, except a wrestling exhibition as defined in Section 18626 of the Business and Professions Code, and specifically including, but without being limited to, such sporting events, contests, and exhibitions as baseball, football, basketball, boxing, horse racing, and wrestling matches, with the intention or understanding or agreement that such participant or player or such prospective participant or player shall not use his or her best efforts to win such sporting event, contest, or exhibition, or shall so conduct himself or herself in such sporting event, contest, or exhibition that any other player, participant or team of players or participants shall thereby be assisted or enabled to win such sporting event, contest, or exhibition, or shall so conduct himself or herself in such sporting event, contest, or exhibition as to limit his or her or his or her team's margin of victory in such sporting event, contest, or exhibition, is guilty of a felony, and shall be punished by imprisonment pursuant to subdivision (h) of Section 1170, or by a fine not exceeding five thousand dollars ($5,000), or by both that fine and imprisonment.
Ca. Pen. Code § 337b