Nathan Horton's time as a Boston Bruin seems to be up.

According to multiple media reports, the forward will not sign an extension with the Bruins and has told the team he intends to explore unrestricted free agency.

The 28-year-old from Welland, Ont., came to the Bruins in a 2010 trade with the Panthers, after spending his first five years of his NHL career in Florida.

Horton's expiring six-year deal was worth a total of $24 million (US), with a final season total of $5.5M and an salary cap hit of $4M.

He scored 56 goals and had 107 points in 169 regular season games with the Bruins, and added seven goals and 12 assists in Boston's 22-game playoff run in 2013.

Horton was also a part of the 2011 Stanley Cup-winning squad, but he was knocked out of the final against the Vancouver Canucks after suffering a concussion from an Aaron Rome hit in Game 3 of that series.

That injury followed him into the next season, where he skated in only 46 games of the 2011-12 season. Another concussion forced him to miss the playoffs in 2012.