The 27-year-old forward had NHL career highs in goals (22), assists (39) and points (61) in 80 games with the Colorado Avalanche last season. He also had eight points (three goals, five assists) in 12 Stanley Cup Playoff games, helping the Avalanche win the Cup for the first time since 2001.
"Andre brings offensive skill and creativity to our forward group," Seattle general manager Ron Francis said. "He has won two Stanley Cups, has good size and has been a very productive offensive contributor. We are excited he is signing with us."
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Selected by the Washington Capitals in the first round (No. 23) of the 2013 NHL Draft, Burakovsky has 295 points (123 goals, 172 assists) in 519 regular-season games with the Capitals and Avalanche, and 47 points (20 goals, 27 assists) in 93 playoff games.
He also won the Cup with Washington in 2018.