California bans chewing tobacco in major league baseball parks
Smokeless Tobacco Is Gone From the Ballpark, if Not the Clubhouse - The New York Times
5 Things the MLB Has Struck Out - Men's Journal
Baseball players, chewing tobacco and cancer - Los Angeles Times
Schilling blames chewing tobacco for mouth cancer - The San Diego Union-Tribune
Curt Schilling blames chewing tobacco for mouth cancer
Smokeless tobacco keeps a tight grip on baseball
Chewing tobacco ban sought by Martin Walsh, Boston, Massachusetts, mayor - CBS News
Proposal could ban Mariners, opponents from chewing tobacco at Safeco Field
The Movement to End an Insidious Baseball Tradition
Can MLB players chew tobacco? - Quora