Shannon Briggs (born December 4, 1971) is an American former professional boxer who competed from 1992 to 2016. He is a two-time world heavyweight champion, having held the lineal title from 1997 to 1998, and the WBO title from 2006 to 2007. Briggs was known for his formidable punching power and aggression, possessing an 88.3% knockout-to-win percentage with 37 knockout wins in the first round. World heavyweight champion Lennox Lewis stated in 2015 that Briggs had the fastest hands and best punching power of any opponent he ever faced. Early life Briggs was born in Brooklyn, New York and raised in the Brownsville section of Brooklyn. For a period in his childhood he was homeless. In 1983, when Briggs was 12, he saw Mike Tyson in Bristol Park, Brooklyn, New York. Briggs' friends called out, "Here comes Mike." Briggs said he was too scared to run and that seeing Tyson that day "changed his life." At age 17, Briggs began training at Jimmy O'Pharrow's Starrett City Boxing Club in Brooklyn, NY. He was diagnosed with asthma as a child. Briggs' mother died in Brownsville due to a heroin overdose on December 4, 1996, Briggs' 25th birthday. Amateur career Coached by James O'Farrell, Briggs got his start at the Starrett City Boxing Club. Briggs competed mainly in heavyweight division (201 lbs,) he became New York City Golden Gloves champion, New York State Champion, National P.A.L. Champion and finished second at the Pan American Games in 1991, stepping into the finals on several byes, thus gaining a silver medal already without a single fight, though losing the final to Félix Savón. In 1992 he became the United States Amateur Champion. Along with two national titles in heavyweight was the winner of the 1991 Daily News Golden Gloves superheavyweight title. By December 1991 he was ranked third nationally in his class. As an amateur he sparred with Phil Jackson, who was a pro at that time, preparing to fight Razor Ruddock. Brigg's lawyer and adviser (equivalent of pro's manager) at that time was Mike Marley, the ex-Post boxing writer. Marley later managed Briggs as a professional. Highlights USA−Poland Duals (heavyweight), Northern Michigan University Olympic Training Site, Marquette, Michigan, February 1991: Defeated Paweł Pyra (Poland) by split decision, 2–1 United States National Championships (heavyweight), Colorado Springs, Colorado, February 1991: 1/8: Defeated Damon Saulberry by unanimous decision, 5–0 1/4: Lost to Bobby Harris by unanimous