Cleveland Browns Speedie was drafted by the
National Football League's
Detroit Lions in the late rounds of the
1942 draft. With the Browns, Speedie quickly became an important part of an offensive attack that featured quarterback
Otto Graham, fullback
Marion Motley and fellow receiver
Dante Lavelli. He was enthusiastic, energetic and fast, posing a challenge for defenders assigned to cover him. He had an unusual running style because of his bout with Perthes Disease, which Lavelli said "gave him an odd gait in which he could fake plays without even trying". Speedie caught the first touchdown in the AAFC's existence in the Browns' opening game against the
Miami Seahawks, a 44–0 win. During the week before the championship game against the
New York Yankees, Speedie and two teammates,
Lou Rymkus and team captain
Jim Daniell were arrested after an argument with Cleveland police. Daniell was driving a car with Rymkus and Speedie as passengers as they waited for Speedie's wife to return on a flight from Utah. A police car was blocking Daniell's way, and he honked the horn, leading to the confrontation and arrests. Brown kicked Daniell off of the team, but Speedie and Rymkus were not punished by the team; they were, however, held in custody for several hours and charged with creating a disturbance. The Browns went on to win the championship game in 1946, helped by Speedie's six catches for 71 yards. Speedie led the league in yards per catch, with 23.5, and scored seven touchdowns. After the season, he was named along with several teammates to the AAFC's all-league team. The 1947 season was another strong one for Speedie. In a game against the
Buffalo Bills, he tied a professional football record by catching a throw from Graham and running 99 yards for a touchdown. He finished the season as the league leader in receptions and receiving yards as the Browns won another championship. His 67 catches and 1,146 receiving yards, in fact, were the second-best in pro football history after
Don Hutson of the
Green Bay Packers, who caught for 1,211 yards in 1940. Speedie was named by news outlets as a first-team
All-Pro. Speedie's success in 1947 came as he, Graham and Lavelli gelled as a passing and receiving unit, having studied hours of tape and worked on their technique and coordination. Speedie studied how defensive backs moved their feet and tried to break into the open by exploiting mis-steps. They experimented with
screen passes and made modifications to common receiving routes to exploit the weaknesses of defenses. The Browns had a perfect season the following year, winning the championship for a third straight time. Speedie led the league in receiving and was named an All-Pro again. The 1949 season brought another championship and another All-Pro season for Speedie, who led the league in receptions for the third year in a row. He had 228 receiving yards in a game against the Yankees, which remains a Browns record.
Tom Landry, a Yankees cornerback who went on to coach the
Dallas Cowboys, was assigned to cover Speedie and called it "the most embarrassing athletic performance of my entire life". The AAFC dissolved after the 1949 season and the Browns, along with two other teams, were absorbed by the more established NFL. Speedie was the AAFC's all-time leader in receptions and receiving yards, with 3,554. Cleveland's success continued in the NFL in 1950, silencing skeptics who thought the team stood out only because of the poor quality of competition in the AAFC. After beating the two-time defending NFL champion
Philadelphia Eagles in the first game of the season, the Browns advanced to the
championship game, where they beat the
Los Angeles Rams 30–28 on a last-second
Lou Groza field goal. Speedie had 548 receiving yards during the season and was selected for the NFL's first-ever
Pro Bowl. The Browns reached the NFL championship game in 1951 and 1952, but lost both times. Speedie led the NFL in receiving in 1951 and was named a first-team All Pro, but he did not play in the championship game due to an injury. He was selected for the Pro Bowl for a second time in 1952. Brown then threatened to sue Speedie for violating his existing contract with the team, saying the Browns had exercised an option to extend the deal after it expired in the summer of 1953. "This was a case of jumping a contract, pure and simple, as this young man morally and ethically had a contract with us", Brown said at the time. He had a league-leading seven touchdowns in 1953, and 576 receiving yards the following season. Speedie was sent to the WIFU's
BC Lions in 1955, but played only one game for the club. Speedie hurt his left knee and was declared out for the season. He had suffered a hairline leg fracture and underwent surgery on torn ligaments in his knee and ankle. He was expected to scout for the Lions as he recovered. After the injury, Speedie was cut from the Lions' roster and did not play professional football again. At the end of his career, Speedie was one of the most prolific receivers of his era. He averaged more than 800 receiving yards a season during his seven years in the AAFC and NFL, a mark that was not surpassed for 20 years after he left the game. His career average of 49.9 receptions per season stood for 25 years. He was named to the
National Football League 1940s All-Decade Team and was selected by news outlets as a first-team All-Pro six times. The authors of the official NFL encyclopedia named him one of the league's 300 greatest-ever players. ==Coaching career==