Cleveland reached the NFL championship in 1957, losing to the Lions, and made the playoffs in 1958. Lahr stayed with the Browns through the 1959 season, when he was switched from defensive halfback to safety. He had 44 interceptions in his Browns career, which stood as the record for most team interceptions by a Browns player until it was later broken by Thom Darden. He also ran back five interceptions for touchdowns, which remains a team record.