Nope. This is completely out of LeBron's character. Chad Sonnen should be sued for slander, if I were LeBron I'd sue every last penny out of that no-name and burn it right in front of him.
Sonnen is the greatest trash talker in the history of professional sports. Anyone who takes him seriously is dumb, he's playing a character for entertainment value.
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I've met Tim Duncan. He's just like he is in his interviews. Quiet, somewhat sullen, but not in a bad way...just his mannerism. Aside from that he was polite and normal. Of course, I wasn't being a d-bag fan...he and Antonio Daniels were shopping in my store on a quiet Monday evening in the Galleria and nobody was bugging them. Answered a few questions for him and treated him like a normal person and he was normal back.