It appears a key piece in the Bruins' 2010-11 Stanley Cup run will not be back in 2013-14.
Nathan Horton has told Boston he wants to explore free agency, according to Bob McKenzie of TSN, who spoke to the winger's agent, Paul Krepelka.
"It's not a financial issue, just a decision to move on," Krepelka said.
Horton's unrestricted free agency rights are now available in a trade, according to McKenzie. Horton scored 13 goals and tallied nine assists during the regular season in 2012-13 with the Bruins. He added 19 points in 22 playoff games with seven goals and 12 assists.