SANTA CLARA >> Nick Bosa is revving up for the 49ers’ season by watching film and drawing inspiration from 2022, understandably so. He’s flashing back to how he prepared for a season that ended with him as the AP NFL Defensive Player of the Year.

“It reminded me to keep honing in on things that make me elite and not getting too caught up (in other stuff),” Bosa said Wednesday during organized team activities. “You only have so many reps in football. You don’t have that many reps in practice.

“So I’m sticking with the bread and butter. Obviously, I can work those other change-up moves. But I’m focusing on the things that make me good, make me great.”

Bosa, who led the NFL with 18 1/2 sacks in 2022, has been a lynchpin of the 49ers’ defense since 2019. He acknowledges he’s now on a “very different looking team,” and he’s excited about that.

Perhaps the most significant change is not about his fellow linemen but rather the return of defensive coordinator Robert Saleh, who left four years ago to coach the Jets.

“I appreciate him more now. When I was a rookie, I didn’t really know what I had with him as a defensive coordinator,” Bosa said. “It’s great to have him back. I just love him as a man. He’s a good dude.” Another “really cool” addition to the staff is assistant head coach Gus Bradley, who Bosa got to know when Bradley — “just the nicest guy” — coached Joey Bosa as the Chargers’ defensive coordinator from 2017-20.It was defensive line coach Kris Kocurek who sent Bosa a cut up of film he studied before his 2022 season. “I watched what I was focused on and working on intensely going into that year,” Bosa said. “It was interesting to see. A lot of the time, at this point in my career, I’ve played so many years that I forget what I was focused on each year going in, because you focus on a couple of things.”

After observing Wednesday’s organized team activities on a scheduled rest day, Bosa sounded optimistic about the 49ers’ reinforcements on a radically revised defensive front, plus other changes to the franchise since last season’s 6-11, last-place finish. Here are five areas he touched on in his first media session in five months.

Bosa on HUFF >> Bryce Huff, who made his practice debut Wednesday, is no stranger to Bosa, who said he admired how Huff excelled two years ago as a New York Jets pass rusher. When a reporter asked about “Huff,” Bosa paused then responded: “I thought you meant Hufanga,” in reference to former 49ers safety Talanoa Hufanga.

As for Huff, Bosa said: “I think he’s going to be our pass rush on the other side end. It’s a big position. He’s one of the guys I really liked to watch when he was with the Jets (2020-23). It didn’t work out with the (2024) Eagles. But if you take a guy in a four-down attack front and put him as an outside ‘backer, it’s not always going to work out. He’s elite at certain things and we’re going to use him that way, and I’m excited to see it.”

Huff, donning the same No. 47 he wore with the Jets, received extra instruction from defensive line coach Kris Kocurek during Wednesday’s defensive line drills, then watched from the defensive sideline during the full-team session.

Impressed with WILLIAMS >> Williams, the 49ers’ top draft pick, worked on the side with the 49ers’ head trainer but did not seem seriously injured. Meanwhile, Williams has impressed Bosa over the past month, not only with his obvious talents but also with his willingness to learn.

Bosa said he wants to get Williams “focused on the right things, things that will make him effective right away and things I wish I knew.” Bosa circled back later to commend his rookie season’s mentors, led by DeForest Buckner, along with Arik Armstead, Dee Ford, and Solomon Thomas. Bosa complimented the 6-foot-5, 267-pound Williams’ length, size, explosiveness, strength, and physicality, or simply: “All the things you want.”

BROTHERLY LOVE >> Bosa acknowledged he was excited about possibly having his older brother, Joey Bosa, join him on the 49ers in free agency before the Buffalo Bills signed him on a one-year, $12.6 million deal.

“Maybe for 5 minutes on the phone. Maybe I can’t say that. Maybe for a moment,” Bosa said of a possible 49ers union. “It was (exciting), but business is business. I’m happy for him. He’ll get a good opportunity over there.”

Bosa on PURDY >> Two years after holding out for what was then the largest contract in 49ers’ history, Bosa was pleased to see Brock Purdy get his deal done last month while partaking in the offseason program. “I know how stressful it can be and he’s not the type to hold out,” Bosa said. “He’s not the type to change, but he changed his helmet today.

“He’s playing really good right now, it looks like, so I’m excited to see him keep taking steps. He’s young and I’m sure he’s going to get better.”