However, after the 1979 merger of the two leagues (including the Jets) and reportedly in financial straits, Hull came out of retirement to play once more for the NHL Jets.
Hull je kariero začel v ligi OHA pri klubu St. Catharines Teepees, po treh sezonah pa je prestopil v NHL klub Chicago Black Hawks, za katerega je odigral petnajst zaporednih sezon.