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Dan Campbell (head coach) will have to control Dan Campbell (crazy competitor)

When he arrived in Miami as an NFL intern coach, fresh off a 12-year playing career, Dan Campbell was still a little nuts.

His mind told him he wasn't playing anymore. His emotions, his desire, his personality, his competitiveness told him, go get 'em!

"Those days are done," Campbell told me this week. "I think I've been able to step back. In 2010 when I got here and I was working with the offensive line, I was the intern under Tony [Sparano], the first three games I almost passed out each game I was yelling so hard.

"I was running around. It was unbelievable. I figured out I can't sustain this. And I wasn't playing anyway, so what am I doing? So I've finally been able to keep my emotions in check and I've gotten better because the reality is I can't [play] anymore because if I could, you'd still be doing it.

"So I'm much better."

Campbell was more controlled as the team's tight ends coach although the guy was still neck-veins-bulging intense on the sideline. But on Sunday as the interim head coach of the Miami Dolphins, Campbell will have to be as controlled as perhaps he's ever been on a sideline.

"I'll be fine. I'll keep my emotions," Campbell told me. "It doesn't mean I might not lose it once or twice but I'm in control of what I need to be in control of. I'm aware of it."

Campbell has been challenged this week to, pardon the cliché, take it one day at a time. He has been counting down the practices. He's been putting one foot in front of the other. He's tried to avoid thinking about Sunday's game against the Tennessee Titans -- his first as interim coach.

"I'm not even thinking about it. I really don't want to think too far, to even the game yet," Campbell told me. "Because when I start thinking about that game on Sunday I start getting butterflies. It's a good nervousness. It's a good energy. But I don't want to get there yet because I'll end up nuts. I'll use up all my emotion before I'm ready to get there.

"The time will come but I just want to make sure that every day, like when I wake up in the morning, I want to make sure the schedule is right. And when I go to bed at night I want to make sure I put everything to bed for that day. And all I'm thinking about is, "Am I doing what's right for these players? Am I giving them the best opportunity to go to the game, play fast, compete and fight?' That is my sole purpose right now. That's all I'm thinking about right now. I want to give them every opportunity to have success."

Things are going to be different on the Miami sideline on Sunday. The past four years the Dolphins have had a composed, organized, restrained (maybe too restrained) head coach on the sideline. 

Some of that changes Sunday.