Pittsburgh Penguins general manager Jim Rutherford made it clear that changes were coming to his team this offseason.

On Saturday evening he made his first one.

The Penguins announced that they have traded defender Olli Maatta to the Chicago Blackhawks in exchange for forward Dominik Kahun and a 2019 fifth-round draft pick that originally belonged to the Tampa Bay Lightning.

It is a trade that accomplishes quite a bit for both teams.

First, from the Pittsburgh side, it clears up a log-jam the team had on its blue line with as many as eight NHL defenders either under contract or under team control (Marcus Pettersson is a restricted free agent) for this season. That alone made it seem likely that someone was going to be on the move, and especially after the team’s defensive play regressed again this past season and had a particularly brutal playoff run against the New York Islanders. By trading Maatta, it not only clears a roster spot but also sheds more than $3 million in salary cap space given that Kahun is still on an entry-level contract and counts only $925,000 against the cap for the 2019-20 season.

It also gives them some much-needed youth at forward.

Even after Maatta’s departure the Penguins still have a lot of questions to deal with on defense, where Jack Johnson and Erik Gudbranson are still taking up more than $7 million in salary cap space over the next few seasons (not ideal!), while Justin Schultz is an unrestricted free agent after this season. Will more players be on the move to address that position? Or does this just make it more likely the returning players take on bigger roles and are more set in the lineup? Based on what we have seen the past few seasons more changes are going to be needed.

The 23-year-old Kahun scored 13 goals and added 24 assists for the Blackhawks in 82 games this past season, his first full year in the NHL.

The addition of the draft pick also gives the Penguins six picks in this year’s draft: A first, a fourth, two fifths, and two sevenths.

As for Chicago, Maatta joins a defense that has needed an overhaul for a few years now and provides a fresher, younger face in the lineup. Even though Maatta has six years of NHL experience under his belt he will still only be 25 years old when the 2019-20 season begins. His career has gone through some extreme ups and downs. When he made his debut during the 2013-14 season he looked like a player that had legitimate top-pairing potential in the NHL could be on his way to becoming a cornerstone player in Pittsburgh. But in the years that followed he had to overcome cancer and an extensive list of injuries that sidetracked his career and led to some pretty significant regressions across the board. Injuries have still been an issue before him in recent seasons, but he seems to have understood his limitations and adjusted to the sort of game he has to play to make a positive impact.

He is not going to bring much speed to the Blackhawks’ blue line, and he tends to play a more conservative game when it comes to defending entries at the blue line, but he is a sound player in his own end and while he lacks top-end speed, is still very good with the puck on his stick. When he is at his best, he plays a clean, quiet game that will not get noticed (and there is nothing wrong with that; not everyone is going to be Erik Karlsson).

The problem is he is still prone to getting beat by faster forwards and when it happens it can at times look bad, which then leads to criticism.

He appeared in 60 games for the Penguins in 2018-19, scoring one goal and 14 total points. He averages around five goals and 25 total points over 82 games.

He has three years remaining on a contract that carries a salary cap hit of just over $4 million per season. He alone is not going to fix all of the Blackhawks’ shortcomings on defense, but he is not a bad addition, either.

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Adam Gretz is a writer for Pro Hockey Talk on NBC Sports. Drop him a line at phtblog@nbcsports.com or follow him on Twitter @AGretz.