Canseco and his twin brother Ozzie are the defendants in a civil trial on a suit brought by two California men who claim they were injured in a fight at Opium nightclub in 2001, the South Florida Sun-Sentinel reported Tuesday.
Jury selection was completed Monday with the seating of four men and two women on the panel. The trial is expected to last a week.
Christian Presley said he suffered a broken nose and Alan Cheeks said his lip was injured so severely he could no longer play the saxophone. Both are seeking an undisclosed amount for their injuries and punitive damages.
The brothers have pleaded guilty to aggravated assault criminal charges and were placed on probation, but said they did that only to avoid a trial.
Canseco is best known recently for his best-selling book, "Juiced" in which he alleged widespread steroid use in Major League Baseball.