McGwire, a former USC baseball star, said he regrets using performance enhancing drugs. He acknowledged their use during the 1998 season when he smashed the all-time record with 70 home runs.

I never knew when, but I always knew this day would come. It's time for me to talk about the past and to confirm what people have suspected. I used steroids during my playing career and I apologize....

I wish I had never touched steroids. It was foolish and it was a mistake. I truly apologize. Looking back, I wish I had never played during the steroid era.

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