He's a racist because jeff Pearlman, a jackass reporter who no one respected and Jeffrey Leonard, an a-hole if there ever was one, said so? Those are great sources.
Tony Gwynn, Dave Stewart, and Kevin Mitchell have defended Clark. Those guys seem like stand-up, respectable individuals...much more than a reporter who has a grudge against Clark and a teammate who had issues with every human being he met.
I'm not saying Clark wasn't, but just because someone says something doesn't mean it's true.
And honestly, I will bet 85% of pro athletes would meet the a-hole criteria that most people have.