oan Guzman, who knocked out Jason Davis in December and then tested positive for the diuretic Furosemide, admitted he used the banned substance at a hearing before the Nevada State Athletic Commission and was fined and suspended, according to executive director Keith Kizer. Guzman, a former junior featherweight and junior lightweight titleholder, was fined $3,750 -- 25 percent of his $15,000 purse -- and suspended for eight months from the date of the fight. The result of the welterweight bout, which Guzman initially won via second-round knockout, was changed to a no contest. The 34-year-old Guzman, who has been released from his promotional contract by Golden Boy, fought Davis on Dec. 11 at Mandalay Bay in Las Vegas on the untelevised undercard of junior welterweight titlist Amir Khan's defense against Marcos Maidana. Read more: http://sports.espn.go.com/sports/boxing/news/story?id=6080614
