Back National Association of Professional Base Ball Players Danish National Association of Professional Base Ball Players English National Association of Professional Base Ball Players French 全米プロ野球選手協会 Japanese 미국 프로 야구 선수 협회 Korean National Association of Professional Base Ball Players Portuguese National Association of Professional Base Ball Players Serbo-Croatian 國家職業棒球員協會 Chinese
Die National Association (NA) war die erste professionelle Baseball-Liga der Welt. Ihr voller Name lautete National Association of Professional Base Ball Players (NAPBBP). Sie bestand von 1871 bis 1875.