Shannon Briggs (born December 4, 1971) is an American professional boxer. A veteran of the sport since 1992, he has held a world heavyweight championship twice, including the lineal title from 1997 to 1998, and the WBO title from 2006 to 2007. Briggs is known for his formidable punching power, possessing an 88.3% knockout-to-win ratio, with 37 knockout wins in the first round. Undisputed heavyweight champion Lennox Lewis stated in 2015 that Briggs had the fastest hands and best punching power of any opponent he ever faced. He holds notable wins over heavyweight champions; George Foreman, Ray Mercer and Siarhei Liakhovich.
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.