The 1.88 m wide Links boom was an outstanding amateur boxer in the light heavyweight division. He won the 1999 U.S. Championships in Colorado Springs, the National Golden Gloves in Syracuse and the World Championships in Houston. He won it against Dutchman Erik van den Heuvel, the Englishman David Haye, the Cubans Umberto Savigne and Ali Ismailov of Azerbaijan and John Dovi of France.
In February 2000, he won the U.S. Olympic excretion in the Challenger class (Challenger 's Bracket) for the Summer Games in Sydney. He was replaced for disciplinary reasons by Olanda Anderson, winner of the Olympic excretion in Master Class ( Champion's Bracket), the Simms was also defeated in the final of the U.S. Championships in 2000. This difference in Sydney but from medaillenlos.
Changed recently as 2000 Simms turned professional and won his first twelve fights in a row, ten by knockout. Against the undefeated Felix Cora Jr. ( 10-0 ), however, it reached only a draw in March 2003. In his very next fight in February 2004, he suffered his first defeat when he lost to the undefeated Cuban Yanqui Diaz ( 7-0 ) just on points. In the fight for the U.S. Cruiserweight Championship on June 25, 2004, he lost this time against Felix Cora Jr. just on points.
Another point defeat on 13 May 2005 against Vadim Tokarev ( 18-0 ) finally initiated the decline of his successful professional career. For three months later he lost against Ola Afolabi (9:1) and four months later against Marco Huck ( 11-0 ). Other Losses including against Roman Greenberg ( 24:0 ), Grigory Drozd ( 28:1 ), Yoan Pablo Hernandez ( 16:1 ), Troy Ross ( 21:1 ) and Matt Godfrey (19:1) followed.
On 5 December 2009, he scored a solitary success with the points victory against the German Martin Kempf (12:1 ), which subsequently ended his boxing career. But in March 2010 he lost on points against Alexander Frenkel ( 21:0 ) and in September 2011 for the first time early against Rachim Tschachkijew ( 10:0 ). He suffered another knockout loss 4 February 2012 against Mateusz Masternak ( 24:0 ).
1974: Mate Parlov | 1978: Sixto Soria | 1982: Pablo Romero | 1986: Pablo Romero | 1989: Henry Maske | 1991: Torsten May | 1993: Ramón Garbey | 1995: Antonio Tarver | 1997: Alexander Lebsiak | 1999: Michael Simms | 2001: Evgeny Makarenko | 2003: Evgeny Makarenko | 2005: Jerdos Dschanabergenow | 2007: Abbo Atoyev | 2009: Artur Beterbijew | 2011: Julio Cesar La Cruz