Marciano holds the record with heavyweight John L. Sullivan and Brian Nielsen for the longest undefeated streak by a heavyweight. . He also holds the record for being the only world heavyweight champion to go undefeated throughout his career. Willie Pep, a featherweight, had a perfect 62–0 record before he was defeated once, followed by a 72–0–1 undefeated streak. Packey McFarland was a lightweight (fighting between 1904 and 1915) who lost his first fight and then won his next 98, though he never won the lightweight title. Heavyweight champion Gene Tunney never suffered a defeat at heavyweight and retired as champion, only losing one career fight at light heavyweight.