Lahr continued to play mainly as a defensive left halfback in the following seasons, although he spent time at safety in 1952 and his final season in 1959. The Browns advanced to the NFL championship each year between 1951 and 1953, but lost once to the Rams and twice to the Detroit Lions. Lahr was named a first-team All-Pro by sportswriters in 1951, when he had five interceptions and returned two of them for touchdowns. His blown coverage on a late-game touchdown catch by Jim Doran of the Lions in the 1953 championship was a major factor in the Browns loss. He was nevertheless named to the Pro Bowl after the season, having made five interceptions and returned them for 119 yards. The Browns repeated as NFL champions in 1954 and 1955 behind a strong defense and an offensive attack led by quarterback Otto Graham. Lahr was named a first-team All-Pro for the second time in 1956.