5 , ▁and ▁in ▁ 1 9 3 7 , ▁he ▁was ▁promoted ▁to ▁the ▁chief ▁assistant ▁position . ▁ ▁After ▁that ▁season , ▁he ▁left ▁the ▁co aching ▁ranks ▁to ▁work ▁as ▁an ▁ins urance ▁agent ▁in ▁Pitts burgh . ▁In ▁ 1 9 3 9 , ▁Bow ser ▁returned ▁to ▁Pitts burgh ▁as ▁its ▁head ▁coach , ▁and ▁served ▁in ▁that ▁position ▁through ▁the ▁ 1 9 4 2 ▁season . ▁He ▁res igned ▁his ▁post ▁in ▁January ▁ 1 9 4 3 ▁to ▁take ▁a ▁commission ▁in ▁the ▁United ▁States ▁Navy ▁during ▁World ▁War ▁II . ▁He ▁was ▁replaced ▁by ▁T ▁formation ▁innov ator ▁Clark ▁Sh augh ness y . ▁ ▁Head ▁co aching ▁record ▁ ▁References ▁ ▁Category : 1 8 9 8 ▁birth s ▁Category : 1 9 8 9 ▁death s ▁Category : American ▁football ▁cent ers ▁Category : American ▁football ▁ends ▁Category : American ▁football ▁quarter back s ▁Category : American ▁football ▁tack les ▁Category : American ▁business people ▁in ▁ins urance ▁Category : B ow do in ▁Pol ar ▁B ears ▁football ▁coach es ▁Category : G ro ve ▁City ▁Wol ver ines ▁football ▁coach es ▁Category : P itt s burgh ▁Pan thers ▁football ▁coach es ▁Category : P itt s burgh ▁Pan thers ▁football ▁players ▁Category : American ▁military ▁personnel ▁of ▁World ▁War ▁I ▁Category : American ▁army ▁personnel ▁of ▁World ▁War ▁II ▁Category : Un ited ▁States ▁Army ▁soldiers ▁Category : Un ited ▁States ▁Navy ▁officers ▁Category : Pe ople ▁from ▁West