In 1998, both Mark McGwire and Sammy Sosa hit more than the long-standing single-season MLB record of 61 home runs. Barry Bonds topped the record in 2001 with 73 home runs. McGwire, Bonds and Sosa became the subjects of speculation regarding the use of performance-enhancing substances. McGwire later admitted that he used a steroid hormone that was still legal in baseball during the 1998 season. Baseball's original steroid testing policy, in effect from 2002 to 2005, provided for penalties ranging from a ten-game suspension for a first positive test to a one-year suspension for a fourth positive test. Players were tested at least once per year, with the chance that several players could be tested many times per year.