Yahoo News : Training camp holdouts hurting Chiefs' pass rush: A

The Kansas City Chiefs have been in training camp for almost a week, and three players' absences are becoming increasingly conspicuous. Veteran outside linebacker Tamba Hali and rookie Justin Houston have yet to report for training camp, and with each passing day the two have...

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I question the Justion Houston case. Is he holding out, or does the Chiefs know something that is preventing them from giving him a contract. Like did he fail another Drug test.