TEMPE, Ariz. -- You hear Jonathan Gannon before you see him.
A booming "Hey, hey, hey!" announces his arrival through the door of the media room at the Arizona Cardinals' facility.
Some days, the head coach adds in a few heavy claps to accentuate his greeting, but you can tell pretty quickly how Gannon's day is going by how loud his "heys" are -- and by how many.
The energy the 40-year-old Gannon emits is palpable. It's contagious. It's loud.
It's also, surprising to many, real.
Sitting behind a wide granite desk inside his corner office at the team's practice facility, Gannon said it's how he's wired.