Mark McGwire, St. Louis Cardinals during the home run record

Value of Mark McGwire's 70th home run ball from historic 1998 season drops significantly

When he took Steve Trachsel deep on Tuesday, September 7, 1998, Mark McGwire made baseball history. He broke Roger Maris' record with relative ease,

Mark McGwire 62 (Home Run Record Breaker) St. Louis Cardinals Poster - Costacos 1998

Mark McGwire, St. Louis Cardinals during the home run record breaking season in 1998 in a game agaainst the New York Mets Stock Photo - Alamy

Mark McGwire Made $128,000 For Every Home Run

Mark McGwire's 62nd Home Run Of 1998 Season

Mark McGwire insists he didn't need PEDs to hit 70 home runs

Long Gone Summer' revisits the Sosa-McGwire home run chase

Mark McGwire of the St. Louis Cardinals breaks what is arguably the game's most prestigious single-season record: Roger Maris' mark of 61 home runs - This Day In Baseball

Mark McGwire 'absolutely' believes he would have hit 70 home runs in 1998 without PEDs – New York Daily News

St. Louis Cardinals: How Mark McGwire reinvigorated St. Louis

Sept. 27, 1998: McGwire hits 70 and is saluted as 'the new American sports hero