Beginning with the 1968 NFL season, Hanburger started 135 straight games, a streak that ended in 1977 after he underwent an appendicitis operation. In the Redskins' season finale of that 1977 season, he recorded 3 sacks against the Los Angeles Rams in a 17-14 win. He played in 1978 to finish his 14-year career. In his career, he picked off 19 passes, recovered 17 fumbles, recorded 46 sacks and scored five touchdowns, two on interception returns and three from fumble recoveries.