SACRAMENTO (CBS SF) – A state bill will be introduced Tuesday to ban tobacco from all Major League Baseball stadiums.

Tobacco is already banned a minor league events, and is strongly discouraged in MLB, but Assemblyman Tony Thurmond, D-Richmond, wants to make the ban formal at the highest level of the game in California.

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Thurmond was scheduled to introduce a piece of legislation Tuesday that would eliminate not only cigarettes, but all smokeless tobacco products at California venues.

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Proponents of the ban say it would set the right example for kids and improve health of current baseball players.

The bill would require stadiums to post signs at all entrances and in the dugout at AT&T Park, the O.Co Coliseum, Angel Stadium, Dodger Stadium and Petco Park.

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The announcement comes as a ban is proposed on all San Francisco ball fields.