Here are the new MLB rules for the 2022 season | RSN
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MLB lockout ends as MLBPA, owners reach CBA agreement: Five takeaways with baseball set to return - CBSSports.com
MLB lockout ends: League, players agree on new CBA for 2022 season
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MLBは"飛ばないボール"で投高打低に拍車 打率は1968年以降で最低、本塁打も激減 | Full-Count
Japan's Standardized Baseballs Are Popular With Pitchers - The New York Times
MLB reportedly used two different baseballs in games in 2021
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Nippon Professional Baseball Organization
MLB | Official Info | MLB.com
MLB study can't yet explain juiced ball theories
MLB leans on longtime mud supplier, not Rawlings, to coat balls - Sports Illustrated
What Pros Wear: Rawlings Named 'Official Glove' of Major League Baseball - What Pros Wear
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MLB: With new baseball cutting offense, which hitters are in trouble?
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MLB | Official Info | MLB.com
News emerges MLB used 2 types of baseballs in 2021 as labor deadline passes : NPR
MLB labor dispute: Baseball appears headed for first work stoppage in decades
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ローリングス)Rawlings MLB オフィシャルボール - | ローリングス(Rawlings) | ボール・ボールケース
