Carroll's energy is known and obvious, but he cranked it up a notch while taking on the challenge of coaching the Las Vegas Raiders.

Pete Carroll will turn 74 in September when he embarks on his first season as head coach of the Raiders.

The culture king is back in the NFL. And, oh boy, does he have his work cut out for him. Arguably no NFL head coach has done a better job in the past couple of decades of creating a culture, a vibe, an attitude in and round his team than what Pete Carroll created during his 14 seasons with the Seattle Seahawks.