Harrison's intrinsic value and his intimidating on-field style make him an essential part of the Patriots' defense. At this stage of his storied career, entering its 15th season, Harrison's presence on the field isn't a given. But at a time when a lot of his peers are out of the game, the 35-year-old is still, in his words, acclimating players to his shoulder pads.
He wouldn't have it any other way.
"To me, it's all predicated on a couple of things," said Harrison. "One is the workouts and the workout intensity. Do I feel like getting up in the morning at 5:30 a.m., working out twice a day, doing all the little things that it takes in order to keep yourself in great shape?
"And [two], do I want to continue to fly around and hit people and be a part of these meetings? Both answers are yes. I still have that [fire]. I still feel pretty good. I've watched myself on tape, and I'm still moving halfway decent. I'm excited, and Bill, he still wants me to play here. My teammates are still supporting me, and I'm excited."
Belichick is also excited to see Harrison back on the field, preparing for a sixth season in New England.
"It's good. He's got a confidence and a presence out there that is special," said Belichick. "I'm sure everybody on the field, not just the defensive backs, all the defensive players, the coaches, the offensive players, they feel that presence. They feel that confidence. They feel kind of that air he brings when he walks onto the field."
Aiken certainly felt it. So did running back Laurence Maroney. There will be quite a few offensive players celebrating the day Harrison hangs up his spikes.
Few could blame him if he decided to pack it in after the adversity he's endured since the Patriots' last Super Bowl title in 2004. It's been a tumultuous three seasons for the safety sui generis.