His voice booms through the speakers on the sideline. It's raspy, punctuated. And between nearly every play, Green Bay Packers special teams coach Shawn Slocum lowers the microphone on his headset and talks to players individually.
These segments of practice in Green Bay tend to be long, tiresome. But players like Alex Green who'd rather be helping the team elsewhere realize they can't pull up.
"You can't coast here," the running back Green said. "We have guys who actually want to be out there. We don't have many coasters."
That's not always the case. But in their fourth year under Slocum, the Packers' special teams may be as strong as they've been since the mid-90s. Through the first quarter of this season, special-teams play has essentially sorted out the NFC North. Two trick plays invigorated Green Bay in wins over Chicago and New Orleans, and the team neutralized Devin Hester and Darren Sproles.
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"I think we've gotten it to the point now where we have a good group," Slocum said. "It could go good or it could go bad because large spaces of field are involved and excellent players can make guys miss and make plays, things of that nature. Guys are tuned in. We're focused. Our challenge is to maintain a high level of productivity."
Each summer, coach Mike McCarthy emphasizes and re-emphasizes - with headache-inducing repetition - that special-teams play is a player's ticket to the 53-man roster. For sustained success, the daily stump speech is needed.
Players don't enter the league to be a gunner on the punt team. Yet in these "large spaces of field," the opportunity at dynamic plays increases.
So the Packers try to follow a basic rule of thumb.
"If we can eliminate that from having any negative effect on our team, on our games, we can let our offense and defense go to work," kicker Mason Crosby said. "It's not always glory. We're not going to get all the glory all the time. But if we do our job and we're working week in and week out and no one is talking about us too much, then we're doing our job."