old ▁Know les , ▁and ▁Bob ▁L ocker ▁to ▁all ▁grow ▁a ▁must ache . ▁This ▁back f ired ▁and ▁lead ▁to ▁the ▁birth ▁of ▁The ▁Must ache ▁Gang . ▁ ▁As ▁the ▁must ache ▁spread ▁in ▁popular ity ▁among ▁the ▁team , ▁Charlie ▁O . ▁Fin ley ▁and ▁the ▁other ▁management ▁began ▁to ▁come ▁around ▁to ▁the ▁new ▁look . ▁ ▁Fin ley ▁had ▁come ▁around ▁so ▁quickly , ▁he ▁not ▁only ▁grew ▁one ▁but ▁encourag ed ▁the ▁other ▁members ▁of ▁the ▁team ▁to ▁do ▁the ▁same . ▁He ▁even ▁dub bed ▁that ▁year ' s ▁" F ather ' s ▁Day " ▁as ▁" M ust ache ▁Day " ▁and ▁offered ▁a ▁$ 3 0 0 ▁reward ▁to ▁anyone ▁who ▁could ▁grow ▁a ▁must ache ▁by ▁then . ▁Once ▁" M ust ache ▁Day " ▁rolled ▁around , ▁all ▁ 2 5 ▁members ▁of ▁the ▁Oak land ▁Athletics ▁was ▁sport ing ▁a ▁must ache , ▁even ▁Dick ▁Williams ▁decided ▁to ▁grow ▁one ; ▁to ▁further ▁promote ▁his ▁team ' s ▁new ▁look , ▁every ▁fan ▁that ▁showed ▁up ▁to ▁the ▁Oak land ▁Stadium ▁we aring ▁a ▁must ache ▁gained ▁adm itt ance ▁for ▁free . ▁As ▁though ▁to ▁ir rit ate ▁the ▁other ▁own ers ▁even ▁more , ▁Fin ley ▁took ▁it ▁one ▁step ▁further ▁by ▁making ▁his ▁team ' s ▁uniform s ▁different ▁from ▁the ▁rest ▁of ▁the ▁league , ▁the ▁traditional ▁baseball ▁p ants ▁and ▁black ▁and ▁grey ▁j er sey ▁was ▁replaced ▁with ▁ ▁a ▁" two -