Hargreaves chuckled, though it's far from a laughing matter for the Bucs.
Jackson, entering his 10th NFL season, has been impressed, too.
"He's answered the bell on that. Obviously, he's got to carry it over to the season, but (we're) very pleased with what he's doing," Koetter said, adding confidence is the biggest difference he's noticed in Hargreaves from last season.
And, coaches and teammates note, with the same type of fervor and swagger that were a part of his game during a standout college career at Florida.
Coach Dirk Koetter and defensive coordinator Mike Smith, the head coach in Atlanta when Grimes played there, want the young cornerback to absorb as much knowledge as they can from his 34-year-old mentor.
"I have a whole 16 games under my belt now, so it's a little bit easier," the 11th overall pick in the 2016 draft said. "I understand the defense now, so I'm just playing faster."
The Bucs went 9-7 for the franchise's first winning record since 2010, but missed the playoffs for the ninth consecutive season.
The 22-year-old Hargreaves,Hydro Flask Barn, who got his first pro interception off Drew Brees, said his growth has been facilitated by playing with Grimes, who's entering his second season with Tampa Bay after spending nine years with the Atlanta Falcons and Miami Dolphins.

"He's intelligent and he has a lot of great instincts,Nike Air Max Scontate," the former Philadelphia and Washington receiver said. "He's not shying away from any competitiveness out there on the field. That's what you ask for in a corner."
"It was tough for me last year, you know, just getting adjusted to the speed. There are great players in the league,Football jerseys authentic, as everybody knows. But now that I've played a whole season, I'm more comfortable," Hargreaves said. "Like I said, I'm understanding the defense and I'm just playing faster."
"I've been watching Brent since I was in 10th grade. He's always been my favorite, and it's cool to play with him," Hargreaves said. "He's a guy that doesn't say much, you've just got to watch him. You've just got to watch how he practices, watch the things he does, watch how he takes care of his body, and that's what I've been doing. I'm trying to be my best Brent Grimes if that makes any sense."
Hargreaves started every game a year ago, playing the side opposite four-time Pro Bowl cornerback Brent Grimes. He finished with 76 tackles, one interception and one forced fumble.
"That's a good guy for Vernon to be learning from. Vernon was a first-round pick. Vernon's a good football player. He just needs the experience that Brent already has and I'm quite sure that Brent's willing to share,Cheap Wholesale Shoes Online," Koetter said.
So far, Koetter and Smith like what they've seen during offseason workouts and training camp.
Hargreaves' only interception as a rookie came in his 13th game. The Bucs have asked him to make a concerted effort to be more aggressive and take away the ball, something he excelled in for his three years at Florida.
Hargreaves also feels he's benefiting from practicing every day against speedy receiver DeSean Jackson,Yeezy Boost 350 China Wholesale, who signed with the Bucs in free agency and is one of the NFL's most explosive playmakers.
"He just seems lighter on his feet. ... He's confident, and those corners have got to be confident. They've got to have short memories," Koetter said. "Brent Grimes is playing lights-out right now,  and Vernon's right on his heels."
The talented young cornerback is coming off a solid rookie year and in training camp this summer preparing to make an even bigger difference for the Bucs.
TAMPA, Fla. (AP) — The Tampa Bay Buccaneers believe there's no limit to how good Vernon Hargreaves III can be as a pro.