After 15 NHL seasons, Rick Nash has announced his retirement.

Nash, 34, announced his decision in a statement on Friday morning through his agent Joe Resnick. 

"Due to unresolved issues/symptoms from the concussions sustained last March, Rick Nash will be forced to retire from the game of hockey," the statement read. "Under the advice of his medical team, the risk of further brain injury is far too great if Rick returns to play. 

"Rick would like to thank everyone who has supported him during this difficult time period."

Nash became a free agent on July 1, but chose not to sign with any teams as he weighed his options for the future. According to TSN Hockey Insider Darren Dreger, the Toronto Maple Leafs, San Jose Sharks, Columbus Blue Jackets, Boston Bruins and Pittsburgh Penguins were among the teams checking in on his status over the past few months.