MLB tightens coronavirus rules, including wearing masks in dugouts and adding compliance officers - The Washington Post
Major League Baseball to Players and Staff: Wear Mask or You're Out!
Masks halt COVID, but pro-sports athletes are divided on wearing them
Mask Mischief - WSJ
Sports Apparel
game_recommendations/seed_data/testfile15.json at master · ceorourke/game_recommendations · GitHub
Masks in the dugout? Is Major League Baseball serious? Let's hope not.
Shirts/Tops Design - Vanguard Emblematics
Baseball's back in South Korea. What does it mean, if anything, for MLB's chances of playing a season?
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MLB players wearing masks on the field – and some may in games
List of face masks worn by active MLB Umpires as of 6/21/2012 - Umpire Equipment - Umpire-Empire