In his long career won amateur southpaw Beyer 235 of 274 fights. Already as a teenager he was able to celebrate successes and was starting for the SG bismuth Gera in the GDR student, youth and junior champion. In 1988 he also won the title at the East German Senior Championships and was in Gdansk, with a final victory against the Romanians Zoltan Lunka, European Junior champion at flyweight (51 kg). In 1989, Beyer punched at the Junior World Championships in Bayamón (Puerto Rico ) and reached there in the featherweight (57 kg), the final, where he lost to the Puerto Rican Carlos Febres on points 20-27.
After the reunification of Germany Beyer in 1993 and 1995 German champion in the light middleweight (71 kg), 1994, he lost the final Mario Veit. At the World Championships in Tampere, Finland in 1993, he left in the second round, he lost to the Romanians Francisc Vaştag 3-13. In 1995 he reached at the championships in Berlin a third place, where he lost in the semifinals against Vaştag 4-8. 1996 defeated Beyer Vaştag again in the finals of the European Championships in Vejle (Denmark) 4-14.
Beyer took for Germany twice in the Olympic Games in part, but failed each early 1992 in Barcelona, he lost in the second round by abortion in the first round against Cuban Juan Carlos Lemus. In Atlanta in 1996 he managed a victory ( 17-12 ) against the three-time amateur world champion Vaştag, he then failed but in the quarterfinals of the Kazakhs Jermachan Ibraimow 9-19.
1996 Markus Beyer was professional and was taken by the Promoter Wilfried Sauerland under contract. His coach Ulli Wegner was, who has also trained him as an amateur. In his 17th pro fight Beyer got the opportunity to fight for a world title for the first time. On 23 October 1999, he won with a points victory against the British, Richie Woodhall the WBC title at super middleweight. He was only the third German after Max Schmeling and Ralf Rocchigiani, who managed to become world champion abroad.
Already in the second title defense on May 6, 2000, he lost the belt but due to a technical knockout in the twelfth round to Glenn Catley. In the following three years, Beyer worked with eight wins again in the top rankings and got a renewed title fight against reigning WBC champion, the French-Canadian Eric Lucas. He was on 5 April 2003 by a narrow points victory world champion again. His first defense of the title he graduated in August 2003 with a controversial victory against Australian Danny Green. Green had sent in the first two rounds to the ground Beyer, but was then disqualified for intentional headbutt.
On June 6, 2004, he lost the WBC title after a surprising point defeat to the Italians Cristian Sanavia, but the belt was four months later in a direct rematch by KO recover in the sixth round, and so for the third time to become world champion at super middleweight by the WBC version. In March 2005 he won the rematch against Danny Green just on points. The title defense against Sakio Bika from Cameroon was canceled in May 2006 after the fifth round due to a laceration under Beyer's right eye due to a headbutt Bikas prematurely and considered a tie. On October 14, 2006 in Copenhagen, a unification fight against the Danish Mikkel Kessler, title holder of the WBA Association instead. Beyer lost the match already in the third round after a quick combination of Kessler by KO
After this defeat, rumors of a possible resignation Beyers from boxing were loud, but was never officially announced. Instead, Markus Beyer said during his moderation of activity in August 2007 at the ARD that he got through the fight between Arthur Abraham and Khoren maneuver itself again like boxing and wanted to return to the ring. After lengthy disagreements with his promoter Sauerland Beyer joined the end of 2007 to Arena Box-Promotion and signed a contract for four fights for the Hamburg boxing stable. For the boxing stable, however, he completed only a fight, a points victory in a fight against Russians build Murad Makhmudov in March 2008, he finally ended his playing career after lengthy injury problems, including a stress fracture in his fifth lumbar extension.
List of professional bouts
Beyer lived by early 2010 together with his wife, the singer Daniela Haak in Lilienthal near Bremen. In 2005 he founded with her promotion agency, 12Rounds who oversaw among other professional boxers such as Danilo Haussler, Richel Hersisia and Alexander Sipos. In March 2009, the authorized biography was published with 40 left and fever. The company 12Rounds left Beyer end of 2009.