Joonas Donskoi announced his retirement from the NHL after seven seasons on Sunday.

The 31-year-old forward said in a post on Instagram that his decision was based on the “multiple concussions” he sustained in his career.

Donskoi did not play with the Seattle Kraken last season after sustaining his seventh concussion during a preseason game. 

“It is extremely hard to let go of something you have put your whole life into, but at this point, I know it’s the right decision for my own well-being and future,” Donskoi said. “I got to live my dream of being an NHL player, which I’m extremely blessed and grateful for. I think I was able to reach my own potential, which was always my biggest goal.”

Selected by the Florida Panthers in the fourth round (No. 99) of the 2010 NHL Draft, Donskoi had 208 points (80 goals, 128 assists) in 474 regular-season games with the San Jose Sharks, Colorado Avalanche and Kraken. He also had 32 points (15 goals, 17 assists) in 69 Stanley Cup Playoff games.

“It would not have been possible without so many people who helped me along the way,” Donskoi said. “Thank you San Jose Sharks, Colorado Avalanche and Seattle Kraken. It was an honor to be part of these three world-class organizations, cities and fan bases. To all of my teammates, coaches, trainers, doctors, front offices and fans, thank you for the best years of my life. I met so many great people and lifelong friends, on and off the ice.”