Check Out This Photo Of Raiders HC Dennis Allen Showing Khalil Mack His Game Face

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Khalil Mack, meet head coach Dennis Allen's "grrrrrrrr" face.

Vic Tafur of the San Francisco Chronicle is kind enough to provide this inside look into the Oakland Raiders mini-camp, with Allen showing the fifth overall pick in the 2014 NFL Draft how to snarl at the NFL level:

 

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