Former baseball star Barry Bonds has been found guilty of obstruction of justice in relation to allegations he knowingly used steroids.
Bond was found guilty of the charge after a 12-day trial in San Francisco, but no verdict was reached on three other charges of perjury after the jury failed to come to a unanimous decision after four days of deliberations.
US District Judge Susan Illston declared a mistrial on the perjury charges, and Bonds' legal team immediately asked for the guilty verdict to be thrown out.
The judge made no decision on their appeal, setting a hearing for late May.
Prosecutors told the court that Bonds had lied to a federal grand jury in 2003, during an inquiry into the Bay Area Laboratory Co-Operative (Balco), which helped athletes gain access to performance-enhancing drugs.
During questioning, the outfielder denied that long-time friend Greg Anderson, who was also a personal trainer affiliated with Balco, had supplied him with such substances.
Bonds becomes the 11th person convicted as a result of Balco's steroid distribution, joining the likes of sprinter Marion Jones.
The 46-year-old former San Francisco Giants slugger holds the record for career home runs, retiring with 762 in 2007.
He also set the single-season record for home runs with 73 in 2001.