Karlsson, one of the NHL's best players, has had many memorable moments since he was drafted by Ottawa ten years ago.
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Here are some key appointments in Karlsson's career:
June 20, 2008: The Senators elect Karlsson in the first round (# 15) of the 2008 NHL Draft after scoring 37 points in 38 games with Frolunda HC of the J20 SuperElit league in Sweden.
October 3, 2009: Karlsson makes his NHL debut and has his first NHL point, an assist, in a 5-2 loss to the New York Rangers.
December 19, 2009: Karlsson scored his first goal of 21 games in his NHL career. It comes 2:55 in the third period against Minnesota Wild Goalie Niklas Backstrom in a 4-1 victory by the Senators.
April 14, 2010: In his first game in the Stanley Cup playoffs, Karlsson, 19, has a goal and an assist in a 5-4 victory against the Pittsburgh Penguins in Game 1 of the Eastern Conference quarterfinals.
Jan 30, 2011: Karlsson plays in his first NHL All-Star Game.
December 16, 2011: With his third assisting game on Zenon Konopka in the second period in a 6-4 victory over the Penguins, Karlsson achieves 100 points in his NHL career.
Jan 29, 2012: Karlsson plays in his home stadium in his second All-Star Game, but gets no point.
June 19, 2012: Karlsson signs a seven-year contract with the senators, who goes through the 2018-19 season.
June 21, 2012: Two days after the signing of the contract Karlsson wins his first Norris Trophy as the best defender of the NHL. He has 78 points in 81 games, 25 more than the nearest defenders (Dustin Byfuglien and Brian Campbell).
February 13, 2013: Karlsson holds an injured Achilles tendon in his left leg as he cuts the cutout of penguin Matt Cooke. He is being operated on and should be out of action for 4-6 months.
April 25, 2013: Karlsson returns to the Washington Capitals ten weeks before the day of the injury. He has two assists, including the primary support on Sergei Gonchar's overtime goal in a 2-1 victory.
Dec. 23, 2013: Karlsson is the third point of the game, an assist on goal by Kyle Turris In the third half of a 5-0 Senator victory against the Penguins, is the 200th point of his NHL career.
February 23, 2014: Karlsson wins a silver medal with Sweden when they beat Canada 3: 0 at the 2014 Olympics in Sochi. His eight points are tied to leading the tournament and he has been named the All-Star Olympic Team and named Best Defender of the Tournament.
October 2, 2014: Karlsson is named the ninth captain in Senator history Jason Spezzawho was traded to Dallas on July 1, 2014.
4 April 2015: With an assist on Clark MacArthur's power play goal in the first leg, Karlsson gets his 300th NHL point in a 4: 3 overtime victory over the capitals. Karlsson (393 games) is the fastest defender to reach the mark in 17 years (Sergei Zubov reached 300 points in 354 games, January 11, 1998).
June 24, 2015: Karlsson wins his second Norris Trophy after an NHL career with 21 goals and leading defenders in 66 points in 82 games.
Jan 31, 2016: Karlsson scores his first goal in an All-Star Game, a 4-2 victory of the Atlantic Division against the Metropolitan Division in the semifinals in Nashville. The Atlantic Division will be suspended in the final game against the Pacific Division 1: 0.
April 5, 2016: The 100th NHL goal of Karlsson and the 80th point of the season come in the first half to a 5: 3 against the penguins.
October 18th, 2016: Karlsson scored a 7: 4 victory over Arizona Coyotes 13 seconds behind. It is the 102nd goal of his NHL career that has brought him past Wade Redden for first place among the defenders in senatorial history.
November 22, 2016: Karlsson joins the 400-point club with a second-round assist before taking the game winner 5:37 into the third phase of a 4-3 victory against Montreal Canadiens.
Dec. 7, 2016: Karlsson has three points and his second, scoring at 7:19 in the first period of a 4-2 win against the San Jose Sharks gives him 411 points that exceed Redden for most of defenders in senatorial history. Karlsson reaches the milestone in 332 fewer games than Redden.
January 29, 2017: Karlsson scores in his second All-Star game, but the Atlantic Division loses 10: 6 in the Los Angeles semi-final against the Metropolitan Division.
Video: MET @ ATL: Karlsson buries refined one-timer
14th June 2017: Karlsson has an operation to repair torn tendons in his left foot. It is known that the injury occurred during the playoffs in which Karlsson missed no game and has 18 points in 19 games to help the senators to move forward within a game of the Stanley Cup final.
November 30, 2017: Speaking about his contract status going through the 2018-19 season, Karlsson tells the Ottawa Citizen: "When I go to the market, I'll get what I'm worth, and it will not be less no matter where I go."
"We're in a pretty similar boat, and when it comes down to it, we'll certainly discuss what we think and what we'll do," says Karlsson's Los Angeles Kings defender Drew Doughtywho can also become an unrestricted free agent after the 2018-19 season. "It's a business we're in, and we have to be treated like we're a business, and we'll treat everyone else as if it's a business."
Jan 28, 2018: Karlsson has three assists for the Atlantic Division in a 7-4 victory against the Metropolitan in the semifinals at the All-Star game in Tampa Bay. He has no points in a 5-2 loss to the Pacific Division in the last game.
February 26, 2018: After Karlsson will remain in Ottawa after the NHL Trade Deadline deadline of 2018, Senator General Manager Pierre Dorion says Team Karlsson will offer a contract extension on the first day they allow it. "I think Erik wants to be a senator for life," says Dorion. "I do not want to speak for him, I'll let him speak for himself, we'll see what the next few months will bring, but if so." Erik Karlsson It is here on July 1st, we will make him a contract offer. "
February 27, 2018: One day after he was not traded, Karlsson receives the point number 500 of his NHL career in the third third of his 3-2 defeat in the capitals.
Video: OTT @ WSH: Karlsson couples the 500th point from an acute angle
"I love this city, I love this community, I love everything about it," says Karlsson before the match. "I've been here for a long time, I've made Ottawa my home and it's always going to be my home … When that time comes, I hope there's a place for me in the future and this team is going in the direction that I want that we have a chance in the near future. "
April 2, 2018: In his final game with the Senators, Karlsson has three assists in a 6-5 loss to the Winnipeg Jets at the Canadian Tire Center. When the game ends, he grabs the puck off the ice.
Video: WPG @ OTT: Karlsson grabs at the end of the last home game Puck
July 1, 2018: Dorion tells the senators Karlsson had offered an extensionbut does not go into the details and says, "I think we owe it to our fans, and we promised at City Hall that we would make a contract offer to Erik Karlsson, and we did."
September 13, 2018: Karlsson is traded to the sharks along with forward Francis Perron forwards Chris Tierney, Defender Dylan DeMelo, forward Rudolfs Balcers, the rights to unsigned draft election forward by Joshua Norris, San Jose's first-round draft pick in the 2019 or 2020 NHL Draft, a second-round pick in the 2019 NHL Draft (better owned by San Jose or Florida own, previously acquired), a conditional selection in the NHL Draft 2021 (San Jose's first or second round) and a conditional selection in the NHL Draft 2022 (San Jose's own 1st).