"He knows how to practice," Coen said. "You don't see him out of control all that often. He has really good body control for a big guy. I'm sure he could probably do a lot more damage out here in some of these settings than he's allowing on, but he's doing it the right way.
"He's focusing on his fundamentals and techniques, he's trying to do the right things all the time."
Walker, who has registered double-digit sacks the last two seasons, can become the first player in franchise history to do so in three consecutive seasons. He said he likes the defense installed by first-year coordinator Anthony Campanile, and he likes the overall attitude of the new coaching staff under Coen.
"I love him," Walker said of Coen. "He brings great energy. All the coaches do, but I think it starts with him. He is a big energy guy. He is always trying to get feedback from the players, so I feel like that is going to carry us a long way as well."
Walker is among multiple Jaguars defensive players – a group that includes defensive end Josh Hines-Allen and linebacker Devin Lloyd – who appear leaner this offseason after gaining weight last offseason to play in then-coordinator Ryan Nielsen's scheme. Walker said he is down about three pounds and has focused on his body composition since the offseason program began in mid-April.
"I am not going to use that as an excuse, but I felt like it took a little bit of a toll on me closer the end of the season," Walker said of the weight gain. "It has its pros and its cons."
Walker said while the Jaguars' defensive scheme isn't dramatically different from last season, there's a different feel that is reflective of Coen and Campanile.
"My main thing is the energy," he said. "It was kind of missing a little bit last year and I feel like it is going to play a big role with what the coaches are bringing in now. I wouldn't say it's different. There are a lot of components to it. It's like a multi-D. You are running some of everything, so you just have to stay on top of your playbook.
"I really don't feel like anything is changing. We are getting after the ball and rolling. There are a lot of things in this defense that I feel like we can take advantage of."
Walker called Campanile "a great guy."