Bonds' lawyers asked the 9th U.S. Circuit Court of Appeals on Thursday to postpone the deadline for his reply brief from Aug. 2 to Aug. 16.
A jury found Bonds guilty in April 2011 of one count of obstruction of justice, finding he gave an evasive answer in 2003 to a grand jury investigating illegal steroids distribution. The trial jury deadlocked on three counts of making false statements, charges which then were dropped.
Major League Baseball's career home run leader was sentenced in December to 30 days of house arrest, two years of probation and a $4,000 fine.
His initial brief was due March 21 and the government's response on April 20, but both sides obtained extensions..