The Raiders touted Jon Gruden's hire as "unfinished business" after Gruden went 38-26 in four seasons as the team's head coach from 1998-2001.
Former Raiders greats say Gruden is indeed all business but if players aren't prepared, Gruden's inner "Chucky" is going to come out in full force.
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"He can be your best friend or your worst enemy," Hall of Fame WR Jerry Rice, who was coached by Gruden in 2001 told ESPN. "That's going to keep you on your toes. And maybe that was something that the players, they were lacking this year.
"I hope these players are ready because they're going to get Chucky. They're going to get him ... Chucky's going to come out."
Gruden may have been mild-mannered working on-air with ESPN since 2009 but the nickname "Chucky" didn't come by mistake.
"Get ready," said Raiders Hall of Fame WR Tim Brown. "It's going to be real. I think the one thing we all loved about Jon is he brought passion to the game. It wasn't just about playing football. It was about playing football with passion."
Charles Woodson added: "He's coming for them, man...They're young and impressionable, and Gruden will bring the best out of them. And if you don't respond, you've got to go. You're all-in or nothing."
Here is a perfect example of Gruden's intense nature when he was coaching the Bucs and quarterback Chris Simms.
Nobody show Derek Carr this video pic.twitter.com/l3r1TA9ev1
— Laces Out (@LacesOutShow) January 9, 2018
Beware, Derek Carr.