Baseball players, chewing tobacco and cancer - Los Angeles Times
New York bans smokeless tobacco for Yankees, Mets; enforcement measures unclear - The Washington Post
Can MLB players chew tobacco? - Quora
Baseball's toxic tradition of chewing tobacco - BBC News
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Chew tobacco, chew tobacco, chew tobacco, spit - NBC Sports
Smokeless Tobacco Is Gone From the Ballpark, if Not the Clubhouse - The New York Times
Tony Gwynn's family suing tobacco industry over his death from cancer - The Washington Post
Smokeless tobacco ban at New York ballparks going into effect
The city of San Francisco wants to stop the Giants from chewing tobacco
Baseball players, chewing tobacco and cancer - Los Angeles Times
Baseball continues to toughen up on tobacco
Can MLB players chew tobacco? - Quora