▁si xty ▁were ▁chosen ▁to ▁become ▁the ▁first ▁girls ▁to ▁ever ▁play ▁professional ▁baseball . ▁The ▁circuit ▁was ▁initially ▁called ▁the ▁All - American ▁Girls ▁So ft ball ▁League , ▁though ▁early ▁in ▁the ▁first ▁season ▁the ▁name ▁was ▁changed ▁to ▁All ▁American ▁Girls ▁Baseball ▁League . ▁ ▁In ▁its ▁twelve ▁years ▁of ▁history ▁the ▁A AG P BL ▁evol ved ▁through ▁many ▁stages . ▁These ▁differences ▁varied ▁from ▁the ▁beginning ▁of ▁the ▁league , ▁progress ively ▁extending ▁the ▁length ▁of ▁the ▁base ▁paths ▁and ▁pitch ing ▁distance ▁and ▁decre asing ▁the ▁size ▁of ▁the ▁ball ▁until ▁the ▁final ▁year ▁of ▁play . ▁For ▁the ▁first ▁five ▁years ▁the ▁circuit ▁used ▁a ▁fast p itch ▁under hand ▁motion , ▁shift ed ▁to ▁side arm ▁in ▁ 1 9 4 7 , ▁and ▁never ▁really ▁became ▁baseball ▁until ▁over hand ▁pitch ing ▁began ▁in ▁ 1 9 4 8 . ▁The ▁inaug ural ▁season ▁took ▁place ▁in ▁ 1 9 4 3 ▁with ▁the ▁teams ▁Ken os ha ▁Com ets , ▁R ac ine ▁B elles , ▁Rock ford ▁Pe aches ▁and ▁South ▁B end ▁Blue ▁So x , ▁and ▁each ▁team ▁was ▁made ▁up ▁of ▁fifteen ▁girls . ▁Har ney ▁was ▁allocated ▁to ▁the ▁Ken os ha ▁Com ets , ▁a ▁team ▁managed ▁by ▁former ▁big ▁le ag uer ▁Josh ▁Bill ings . ▁ ▁In ▁ 1 9 4 3 , ▁Har ney ▁joined ▁a ▁bal anced ▁Ken os ha ▁team ▁that ▁included ▁players ▁as ▁very ▁tal ented ▁pitch er ▁Helen ▁Nicol ,