He averaged 10.5 yards per pass and had a quarterback rating of 112.1 in 1946 , a professional football record until Joe Montana surpassed it in 1989 .
Graham 's play was crucial to Cleveland 's success .
Graham averaged 10.5 yards per pass and had a quarterback rating of 112.1 in 1946 , a professional football record until Joe Montana surpassed it in 1989 .
Graham 's play was crucial to Cleveland 's success .