Blin's record in the ring was 30–12–6 with eight knockouts. He was greatly admired by German boxing fans for his toughness and stamina in the ring. He was briefly Heavyweight Champion of (West) Germany after defeating
Gerhard Zech for the title (he had two draws with him previously). His first professional bout came against Klaus Krüger in October 1964. Blin won this bout, as well as the next five bouts against domestic opponents, and lost his first professional bout in June 1965 to
Ray Patterson in
Jordal Amfi. Blin lost a decision to
Joe Bugner in May 1971 when fighting for the European Heavyweight title. Blin later won the title in June 1972, his greatest triumph in the ring, when he beat Jose Urtain (who had beaten Blin for the same title in June 1970). However, in October 1972, Blin once again faced Bugner who regained the title by knocking the German out in the eighth round. On 26 December 1971, he fought the American boxer
Muhammad Ali at Hallenstadion Arena, in
Zürich, Switzerland, Blin being knocked out 2 minutes and 12 seconds into the seventh round. ==Later years==