Russell, the No. 2 overall pick in the 2015 draft, was dealt to Brooklyn along with center Timofey Mozgov, who is entering the second year of a four-year, $64 million contract. In return, the Lakers received Nets center Brook Lopez and the 27th pick in Thursday's draft.
Pelinka was first asked if Russell was traded in part because the Lakers were so confident in the abilities of point guard Lonzo Ball, whom the Lakers drafted No. 2 overall Thursday.
"I think D'Angelo is a special player and definitely wouldn't want to attach the name 'expendable' next to him, because he's an extraordinary talent," Pelinka said. "We just looked at that trade as really doing three things that were really positive for us.
"One is we got an All-Star caliber [center] that can spread the floor and open things up. Brook Lopez really transformed his game last year and became a guy that was making 3s."
Lopez, 29, averaged 20.5 points, 5.4 rebounds, 2.3 assists and 1.7 blocks for the Nets last season. He also attempted 387 shots from 3-point range and made 34.6 percent of them.
Lopez enters 2017-18 in the final season of his contract that will pay him $22.64 million. His expiring contract and clearing Mozgov off their books will give the Lakers close to $60 million in significant cap room next summer.
"Then of course, we were able to get amazing salary-cap relief and space, so in July of 2018 we have the ability to add hopefully two max-salary players to our franchise," Pelinka said. "And that really fit into our long-term play.
"And then three, it gave us the ability to have four picks in the draft [Thursday]. So we accomplished so much in one trade. It was really the perfect storm for us and we felt like it's going to have a big impact."
Indiana Pacers superstar Paul George, a Southern California native, has indicated he would like to join the Lakers when he hits free agency in 2018. LeBron James also is among the stars eligible to be a free agent next summer.
The Lakers have struck out on big-name free agents for four straight offseasons, but Pelinka says he believes their outlook will be different, in part because of the presence of Earvin "Magic" Johnson, the Lakers' president of basketball operations.
"There's just a renewed energy around here," Pelinka said. "We feel it in the offices every day. We felt through this draft process. I think clearly with Earvin's vision and just his persona, I think the organization is really taking on that positive joy that he seems to live with every day. I think players around the NBA feel that as well and are going to be attracted to that energy here.
"We know the goal here is to compete for championships. That's what we want to do. I think with the leading teams in the league today, we felt like, to be able to look them in the eye and challenge them, we need two superstar players to come here and join this platform and join our core group of players we now have. That's our plan, and we're going to put all of our energy and all of our hard work toward that."
Pelinka proud to make Lonzo Ball's dreams come true
Lakers GM Rob Pelinka talks to Ramona Shelburne about his admiration for Lonzo and the whole Ball family.