Answer
Mark McGwire hit 70 home runs in 1998, breaking the single-season home run record of 61, set by Roger Maris in 1961. McGwire's feat was met with great fanfare, and he was hailed as a hero by many. However, McGwire's home run record has since been tainted by allegations of steroid use. In 2010, McGwire admitted to using steroids during his playing career.