Is Stern petty for blaming Kupchak for failed CP3 trade?

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Is Stern petty for blaming Kupchak for failed CP3 trade? (2:49)

The SportsNation crew, along with actor Freddie Prinze Jr., debate whether it was OK for David Stern saying a trade that would have sent Chris Paul to the Lakers fell apart because of Mitch Kupchak. (2:49)