Edmonton likely will rely on Tyson Barrie to help replace Klefbom, after the 29-year-old defenseman agreed to a one-year, $3.75 million contract Oct. 10 after one season with the Toronto Maple Leafs.
Barrie has scored 346 points (80 goals, 266 assists) in 554 regular-season games with the Maple Leafs and Colorado Avalanche, including 129 points (21 goals, 108 assists) on the power play, and 14 points (one goal, 13 assists) in 26 postseason games.
"We knew we needed to get another defenseman, and I'm excited we got Tyson Barrie," Holland said. "He was a really good player in Colorado, and played good in Toronto but obviously hit the market, and we've got him."
Edmonton expects Ethan Bear to play on the top pair with Nurse, but he remains an unrestricted free agent. The 23-year-old led NHL rookies with an average of 21:58 of ice time per game last season and scored 21 points (five goals, 16 assists) in 71 games.
Holland said ongoing talks with Bear are becoming urgent with training camp set to start Jan. 3. The NHL and NHL Players' Association formally reached agreement Sunday to play a 56-game regular season starting Jan. 13, 2021, and ending May 8.
"We've got to get it now," Holland said. "Certainly Ethan's not in Edmonton, [from] my understanding. Certainly in order to be ready for Day One of camp, on the ice, you've got to be in Edmonton on the 26th of December and then you've got eight days of quarantining, then Day One, Three, Five and Seven you've got to get tested and have four negative tests into Day Eight.
"I would like him in camp. I would like him signed. I'm sure the player and the agent want the same thing. We've got to find something that works for the player and works for the club. I'm prepared to do one year, two years, three years. We haven't talked anything other than one or two or three years. So hopefully we can find a solution and get him into camp. He's an important part of our team."
There are young defensemen in the Oilers system who may have to step up this season. Evan Bouchard, 21, was the No. 10 pick in the 2018 NHL Draft. Edmonton chose Philip Broberg, 19, at No. 8 in the 2019 NHL Draft. Caleb Jones, 23, has played 60 NHL games the past two seasons and shown signs he is ready for full-time NHL duty. William Lagesson, 24, who played eight NHL games last season, and Dmitri Samorukov, 21, are other possibilities.