College All-Stars Hirsch was discharged from the military in May 1946. On August 23, 1946, he led the college all-star team to a 16–0 victory over the NFL champion
Los Angeles Rams in the
Chicago College All-Star Game. Hirsch was named the game's outstanding player, and the
Los Angeles Times described his performance in the game as a "one-man show" after he scored the game's only touchdowns, including a 68-yard touchdown sprint, for the college squad. Hirsch later described the game as his greatest athletic thrill. He ultimately opted not to play in the NFL, instead playing for the
Chicago Rockets of the
All-America Football Conference (AAFC). Hirsch later said the decision to sign with the Rockets was the worst decision he ever made. However, injuries limited Hirsch to five games in 1947. In the fifth game of the 1948 season, Hirsch sustained a fracture on the right side of his skull after being kicked in the head during a game against the
Cleveland Browns. Hirsch did not return to action during the 1948 season, totaling 101 receiving yards and 93 rushing yards in five games. However, the
Los Angeles Rams held Hirsch's NFL rights having selected him in the 1945 NFL Draft, and Hirsch was therefore unable to sign with the Packers. Instead, he signed with the Rams in July 1949. Hirsch earned $20,000 a year from the Rams, following a bidding war with the Hornets. However, after the 1949 season, the AAFC folded, and the Rams reduced his salary with the competition from the AAFC gone. During his career with the Rams, Hirsch never again attained the salary level he was paid as a rookie. Over the course of the 1949 season, Hirsch tallied 326 receiving yards, 287 rushing yards, and 55 return yards on two interceptions. After Hirsch sustained a second head injury (having previously suffered a skull fracture in 1948), Rams coach Shaughnessy had a special, 11-ounce helmet designed for Hirsch, using a strong, light plastic that had been used previously in the construction of fighter planes. In the opening game of the
1951 season, Norm Van Brocklin passed for an NFL record 554 yards, including 173 yards and four touchdown passes to Hirsch. During the season, Hirsch, Van Brocklin,
Bob Waterfield, and
Tom Fears (all four of whom have been inducted into the
Pro Football Hall of Fame) led the Rams to an 8–4 record and a victory over the
Cleveland Browns in the
1951 NFL Championship Game. Easily the best year of his career, Hirsch tied or broke multiple NFL receiving records in 1951. These records include: • Hirsch set a new NFL record with 1,495 receiving yards. Despite the fact that the NFL season consisted of only 12 games in 1951, Hirsch's single-season receiving record stood for nearly 20 years, until the merger of the AFL and the NFL. • Hirsch's average of 124.6 receiving yards per game also set a new NFL record. Through the end of the 2015 NFL season, only two players have exceeded this record. • Hirsch also had 17 touchdown receptions in 1951, tying an NFL record set by
Don Hutson in 1942. Despite the expansion of the NFL schedule to 16 games, the Hirsch/Hutson mark of 17 touchdown catches lasted until the 1980s, and only four players through the end of the 2015 NFL season have exceeded the mark. • On his 17 touchdown catches, Hirsch averaged 51.2 yards, including a 91-yard reception that was the longest of the year in the NFL. After the 1951 season, Hirsch finished second behind
Otto Graham in voting conducted by the
United Press (UP) for the NFL Player of the Year award. He was also selected as a first-team
All-Pro player by both the
Associated Press (AP) and the UP. He was also selected to play in the
Pro Bowl each year from
1951 to
1953. Hirsch had another strong season in 1953, leading the NFL with a career-high average of 23.6 yards per reception. He also finished second in the NFL with 941 receiving yards in 1953 and was selected as a first-team All-Pro by the AP and a second-team All-Pro by the UP. In nine years with the Rams, Hirsch totaled 343 receptions for 6,299 yards and 53 touchdowns. He also gained 317 rushing yards with the Rams. ==NFL and AAFC career statistics==