In a statement released today, Mark McGwire admitted to using steroids when he broke the home run record in 1998, according to ESPN:

“I wish I had never touched steroids,” McGwire said in a statement. “It was foolish and it was a mistake. I truly apologize. Looking back, I wish I had never played during the steroid era.”
“I never knew when, but I always knew this day would come,” McGwire said. “It’s time for me to talk about the past and to confirm what people have suspected.”