| Major Leagues
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| Nykyiset
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USA & Kanada: Major League Baseball: American League · National League
Japani: Nippon Professional Baseball: Central League · Pacific League
Etelä-Korea: KBO League
Taiwan: Chinese Professional Baseball League
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| Lopetetut
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National Association · American Association · Union Association · Players League · Federal League · Negro League Baseball · All-American Girls Professional Baseball League · Nippon Baseball League · Taiwan Major League · China Baseball Association · Australian Baseball League · Continental League · Cuban League · National Association of Base Ball Players · International Baseball League of Australia
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| Minor Leagues
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| Triple-A
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International League · Pacific Coast League · Mexican League (Meksiko)
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| Double-A
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Eastern League · Southern League · Texas League
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| Class-A Advanced
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California League · Carolina League · Florida State League
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| Class-A
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Midwest League · South Atlantic League
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| Class-A lyhyt kausi
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New York - Penn League · Northwest League
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| Aloittelija-liigat
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Appalachian League · Arizona League · Dominican Summer League · Gulf Coast League · Pioneer Baseball League · Venezuelan Summer League
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| Independent League Baseball
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| Nykyiset
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American Association · Atlantic League · Can-Am League · Continental Baseball League · Frontier League · Golden Baseball League · New York State League · Northern League · South Coast League · United League Baseball
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| Lopetetut
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All-American Association · Canadian Baseball League · Central Baseball League · Golden State League · Great Central League · Heartland League · Southeastern League · Western Baseball League
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| Muita liigoja
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| Japani
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Western League · Eastern League
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| Talvi-liigat
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Itsenäiset: Arizona · Dominikaaninen tasavalta · Meksiko · Puerto Rico · Texas
Sisarliigat: Arizona · Havaiji · Venezuela
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| Kansainväliset liigat
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Honkbal Hoofdklasse (Hollanti) · Serie A1 (Italia) · China Baseball League (Kiina) · Israel Baseball League (Israeli) · Shikoku Island League (Japani) · Bundesliga (Saksa) · División de Honor de Beisbol (Espanja) · Kansai Big Six Baseball League (Japani) · Tohto University Baseball League (Japani) · Tokyo Big 6 Baseball League (Japani) · Elitserien (Ruotsi) · Baseball Philippines (Filippiinit) · Baseballin SM-sarja (Suomi)
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