William Lyell (born August 10, 1984) is an American former professional boxer who competed from 2003 to 2013.
[1] He challenged for the IBF middleweight title in 2010.
In February 2009, Lyell upset an undefeated John Duddy in a ten-round fight by split decision.
[2] He then lost a very tough fight to Sebastian Sylvester.
[3] On June 5, 2010, Billy lost to undefeated champion Julio César Chávez, Jr.[4] The bout was held at the Estadio Banorte in Culiacán, Mexico.