Major League Baseball players would be banned from using chewing tobacco at games in California under a bill expected to be introduced in the state legislature on Tuesday, the first in a nationwide campaign planned by anti-tobacco activists.

The bill targets baseball’s ubiquitous habit less than a year after retired San Diego Padres outfielder Tony Gwynn died of cancer of the salivary glands, believed related to chewing tobacco or “dipping” it by lodging it between the lip and the gum.

Thurmond’s bill would ban use of all tobacco products at baseball stadiums in the state, including dipping, chewing, smoking or using electronic or e-cigarettes. It would also require baseball stadiums to post signs announcing the ban in all dugouts, bullpens, locker rooms, bathrooms and at all entrances.