Born in Sweden to Finnish parents, he has both Finnish and Swedish citizenship, but competes internationally for Finland… Played for Finland at the 2017 IIHF World Hockey Championship in Cologne, Germany and Paris, France… Won gold with Finland at the 2016 World Junior Hockey Championship, leading the tournament in scoring and being named Most Valuable Player… Also won gold with Finland’s National Under-18 Team in 2016, where he was named to the tournament All-Star team.

Appeared in 28 games in his rookie NHL season, posting eight points (1g, 7a) and 10 penalty minutes… Scored his first career NHL goal in his NHL debut vs. CGY (10/12)… Was the youngest player to start the season on an NHL roster and finished as the third-youngest to appear in an NHL game… Had a season-high seven shots on net vs. TOR (11/1)… Assigned to Bakersfield (1/9) and posted 28 points (12g, 16a) and 10 penalty minutes in 39 AHL games.

Completed his second NHL season with Edmonton… Set new career highs with 20 points, 12 goals, eight assists and 65 games played… Scored game-winning goals at MIN (12/16) and vs. VAN (1/20)… Posted the first three-point game (1g, 2a) of his career vs. VAN (1/20)… Logged a season-high 20:24 of ice-time vs. CHI (12/29)… Had a season-high seven shots on net twice, vs. TOR (11/30) and at WPG (12/27)… Had his first NHL multi-goal game at CGY (12/2)… Had five multi-point games, including one three-point game and four two-point games… Also had four points (1g, 3a) in 10 games with Bakersfield, leading the team with 31 shots on net… Started the season with Bakersfield (AHL), before being recalled on 11/10.

Posted 83 points (16g, 67a) in 82 NHL games with San Jose… Finished as the runner-up for the Norris Trophy and was named to the NHL’s First All Star-Team for the second time after leading all defensemen in assists and points… Set career highs in both categories and tied his career high in game-winning goals (6)… Eclipsed the 60-assist and 80-point marks for the first time in his career while recording at least 60 points for the fifth consecutive season… Tied for the league lead with a career-high four shorthanded assists and ranked second among blueliners with five shorthanded points… Paced all defensemen with a career-high 88 takeaways and finished seventh among that group in ice time per game (25:06)… Played all 82 games for the fifth straight season, extending his ironman streak to 471 games… Posted six three-point games, marking his new single-season high and the second-most of any NHL defenseman… Was one of five Sharks skaters to score an overtime goal, accomplishing the feat for the fifth straight campaign and scoring multiple (2) for the third time in his career… Opened the season with 20 points (3g, 17a) in the team’s first 16 games, including seven multi-point outings… Earned a point in 12 of 13 games from 10/9-11/8 (3g, 17a), including a career-long, nine-game point streak from 10/9-10/30 (3g, 12a)… Posted six multi-point games in nine contests from 12/27-1/12 (5g, 12a), including four straight from 12/29-1/5 (2g, 9a)… Tied his career high with four points (1g, 3a) at COL (1/2)… Posted an assist/point in five straight games from 1/21-2/7 (2g, 7a), including three points (1g, 2a) and his second career shorthanded goal at CGY (2/7)… Represented the Pacific Division at the NHL All-Star Game, marking his fifth consecutive appearance and the fifth of his career… Scored overtime winners vs. ARI (2/2) and VGK (3/30) to increase his career total to 14, passing Scott Niedermayer for the most overtime goals by any defenseman in NHL history… Tallied 16 points (5g, 11a) in 20 playoff games as San Jose advanced to the Western Conference Final… Led all defensemen in goals during the postseason and ranked tied for fourth in assists and tied for third in points and power-play points (5) and second in even-strength points (11)… Posted an assist and logged 42:04 of ice time in Game 6 of the Western Conference First Round at VGK (4/21), topping 40 minutes for the second time in his NHL career… Earned 10 points (4g, 6a) in seven games during the Western Conference Second Round vs. COL, including four points (1g, 3a) in Game 1 (4/26) and three points (2g, 1a) in Game 2 (4/28).

Returned to Finland to play for Karpat… Led the team in points (53), goals (24) and assists (29)… Ranked fourth in the league in points and tied for third in plus/minus (+30)… Posted four points (2g, 2a) in four games in the Champions Hockey League.

Completed his fourth season with Edmonton and first since 2018-19… Ranked sixth on the team in points (25) and fifth in goals… Set new career highs in points, goals (15) and assists (10)… Posted a career-high four power-play points and two power-play goals… Notched a season-high seven shots on net vs. VAN (1/14)… Posted his first multi-goal game of the season on vs. OTT (2/2)… Recorded a two-game point streak from 2/2-2/6 (2g, 1a)… Registered a three-game point streak from 2/15-2/19 (2g, 1a)… Notched a multi-point game (1g, 1a) at CGY (3/17)… Logged a season-high 20:39 of ice time at OTT (4/8)… Recorded a four-game point streak from 4/17-4/26 (3g, 3a)… Posted a multi-point game (1g, 1a) at VAN (5/3)… Registered a two-game goal streak from 5/6-5/8 (2g)… Appeared in four playoff games, recording two points (1g, 1a)… Ranked fourth among forwards in ice time per game (21:43) and second in blocked shots (4).

Appeared in 65 games collecting 14 goals along with a career-highs in assists (22) and points (36)… Also equaled career highs in games-played and takeaways (27) and set new career bests in power-play goals (4) and power-play points (7), shots (60), hits (101) and ice time per game (16:14)… Ranked sixth among forwards in goals, fifth in assists and seventh in points… Scored the opening goal of the season vs. VAN (10/13) and collected three points (1g, 2a) for the second time in his career vs. CGY (10/16)… Played his 200th career NHL game vs. PHI (10/27)… Started season on a six-game point streak, the longest of his career (2g, 7a)… Scored two goals vs. NYR (11/5), including his first power-play goal of the year… Had goals in three consecutive games from 11/3-11/9 (4g)… Notched his first game-winning goal of the year at VGK (11/27)… Notched his second three-point night (2g, 1a) of the season, including two power-play goals, vs. CBJ (12/16)… Collected a pair of assists vs. OTT (1/15)… Surpassed his previous career high in points (25) with a goal vs. NYI (2/11)… Tallied his first game-winning goal of the year vs. ANA (2/17)… Missed 12 games due to injury, returning to the lineup vs. BUF (3/17)… Posted his sixth multi-point game of the season (2a) vs. NJD (3/19)… Scored the game-winning goal vs. DAL (4/20)… Played all 16 postseason games, registering three points (2g, 1a)… Earned points in back-to-back games from 5/4-5/6 (1g, 1a)… Tied for second among forwards in blocked shots (11) and registered 30 hits while logging 10:05 of ice time per game.

Split his sixth NHL season between Edmonton and Carolina, posting 16 points (5g, 11a) in 75 games… Set new career highs in penalty minutes (32) and hits (139) and matched his career high in blocked shots (26)… Began the season with the Oilers, recording 14 points (5g, 9a) in 58 games… Opened the scoring with his first goal of the season at STL (10/26)… Tallied an assist and logged a season-high 17:59 of ice time at NYR (11/26)… Scored a goal and earned a season-high +2 rating at SEA (12/30)… Scored the go-ahead and eventual game-winning goal in the third period at OTT (2/11)… Traded to Carolina (2/28) and tallied two assists in 17 games with the Hurricanes… Made his Hurricanes debut vs. VGK (3/11)… Earned an assist for his first Hurricanes point vs. NYI (4/2)… Added one assist in seven playoff games, recording his first Hurricanes postseason point in Game 5 of the Eastern Conference First Round vs. NYI (4/25).