Get ready for a double helping of Jon Gruden on the next episode of 'Hard Knocks.'
The Raiders brought in comedian Frank Caliendo, who tweeted that he broke out his amazing Gruden impression in front of the entire team.
Even Gruden must admit this is a spot-on Chucky.
Listen to Caliendo in this ESPN mock QB Camp. Look at the teeth, the eyes, and the eyebrows. This is a Gruden impression that demanded its own HBO cameo.
Next Tuesday's episode can't come soon enough. Knock on wood if you're with me.