s ▁final ▁full ▁season ▁as ▁manager . ▁He ▁made ▁his ▁Liverpool ▁debut ▁under ▁Dal g lish ▁as ▁a ▁substitute ▁for ▁Peter ▁Be ards ley ▁in ▁the ▁Football ▁League ▁First ▁Division ▁on ▁ 1 5 ▁December ▁ 1 9 9 0 , ▁in ▁a ▁ 2 – 0 ▁league ▁win ▁over ▁She ff ield ▁United ▁at ▁An field , ▁and ▁made ▁his ▁full ▁debut ▁the ▁following ▁season ▁( by ▁which ▁time ▁Gra eme ▁S oun ess ▁had ▁become ▁the ▁new ▁manager ) ▁in ▁a ▁ 2 – 1 ▁win ▁over ▁Old ham ▁Athlet ic ; ▁a ▁game ▁in ▁which ▁The ▁Guardian ▁newspaper ▁reported ▁that ▁he ▁" ran ▁his ▁legs ▁into ▁the ▁ground " ▁all ▁day ▁and ▁assist ed ▁his ▁ment or ▁Bar nes ▁in ▁scoring ▁the ▁late ▁winner ▁by ▁f lick ing ▁on ▁Mark ▁Wal ters ' ▁cross . ▁He ▁scored ▁his ▁first ▁ever ▁professional ▁goal ▁with ▁a ▁div ing ▁header ▁four ▁days ▁later ▁on ▁ 2 1 ▁August ▁ 1 9 9 1 ▁in ▁the ▁ 2 – 1 ▁defeat ▁to ▁Manchester ▁City ▁at ▁Maine ▁Road . ▁ ▁The ▁ 1 9 - year - old ▁Mc Man aman ▁quickly ▁became ▁a ▁regular ▁first ▁team ▁player ▁in ▁the ▁ 1 9 9 1 - 9 2 ▁season , ▁making ▁ 5 1 ▁appearances ▁in ▁total ▁in ▁only ▁his ▁first ▁full ▁season ▁– ▁opportun ities ▁in ▁the ▁first ▁team ▁coming ▁as ▁a ▁result ▁of ▁then ▁manager ▁S oun ess ' ▁decision ▁to ▁sell ▁several ▁age ing ▁players ; ▁as ▁well ▁as ▁when ▁John ▁Bar