Sammy Sosa, who joined with Mark McGwire in 1998 in a celebrated pursuit of baseball's single-season home run record, is among the players who tested positive for a performance-enhancing drug in 2003, according to lawyers with knowledge of the drug-testing results from that year.

The disclosure that Sosa tested positive makes him the latest baseball star of the last two decades to be linked to performance-enhancers, a group that now includes McGwire, Roger Clemens, Barry Bonds, Alex Rodriguez, Manny Ramirez and Rafael Palmeiro.

Sosa, who is sixth on Major League Baseball's career home run list and last played in 2007, had long been suspected of using performance-enhancing drugs but until now had never been publicly linked to a positive test.