A record 581 ballots were cast by members of the Baseball Writers' Association of America this year, the results of which were announced Wednesday.
Second baseman Roberto Alomar (90 percent) and right-hander Bert Blyleven (79.7 percent) received more than the required 75 percent of ballot votes and will thus represent the 2011 Hall of Fame class.
McGwire, meanwhile, watched his numbers decrease from 23.7 percent to 19.8 percent. Less than a year ago, he admitted in a statement that he used performance-enhancing substances extensively during his Major League career, including the 1998 season, when he shattered Roger Maris' fabled single-season record of 61 home runs.
Through 16 big league seasons, McGwire compiled a career .263 average and tallied 583 home runs, 1,414 RBIs and 12 All-Star appearances. His 10.61 at-bats per home run are a Major League-best.
Now the Cardinals' hitting coach, McGwire has now been on the ballot five times. Players may remain on the ballot for up to 15 years provided they receive five percent of the vote in any year.
Outfielder Dave Parker, who played in Oakland during the 1988 and '89 seasons, received just 15.3 percent of the votes during his 15th and final year on the ballot.