Justin Gatlin's appeal to the Court of Arbitration for Sport on doping charges was rejected Friday, three weeks before the United States holds its track trials. The three-man CAS panel unanimously upheld the four-year ban given to the 26-year-old sprinter earlier this year by another arbitration panel.

Th ruling means that his hopes for a comeback this year are all but dead, and so are his chances of defending his 100-meter Olympic title.

DALLAS — Authorities said Friday that a convicted steroids dealer who claimed to have sold drugs to pro football players killed himself, and the mother of a woman found dead in his home said she believes he killed her, too.The Dallas County medical examiner ruled 35-year-old David Jacobs' shooting death a suicide, but police in the Dallas suburb of Plano aren't saying whether he shot his on-again, off-again girlfriend.Both bodies were found in the master bedroom of Jacobs' Plano home. He was shot in the abdomen and head, and 30-year-old Amanda Earhart-Savell was shot several times. A .40-caliber Glock was found next to Jacobs, police said.

SAN FRANCISCO — Barry Bonds is headed to trial next March on federal charges of lying to a grand jury about his use of performance-enhancing drugs.