Rubuta ci gaba ga wannan sakin layi - A cikin shekaru shida tare da Giants, ya ga aikin a wasanni uku na gasar zakarun NFL (1956, 1958, 1959)
), yayin da yake fara wasan baya na tawagar taken 1956. Tare da Vince Lombardi a matsayin mai ba da shawara na Giants (1954 <unk> 58), Heinrich ya raba lokaci a quarterback tare da Charlie Conerly, tare da shi ana amfani da shi don bincika tsaro da Conerly ya shiga cikin wasannin don cin gajiyar raunin rauni.