He ultimately opted not to play in the NFL, instead playing for the Chicago Rockets of the All-America Football Conference (AAFC). Hirsch chose the Rockets because they were coached by Dick Hanley, who had been Hirsch's coach with the El Toro Marines team. Hirsch played three seasons with the Rockets from 1946 to 1948. During those three years, the Rockets compiled a 7–32 record and won only one game in each of the 1947 and 1948 seasons. Hirsch later said the decision to sign with the Rockets was the worst decision he ever made.