Nash has retired after 15 NHL seasons due to complications with a concussion he sustained last March, Darren Dreger of TSN reports, citing player agent Joe Resnick.

Nash has yet to determine whether he will return for the 2018-19 campaign, Darren Dreger of TSN reports.

In his first game back since suffering a concussion March 17, Nash took three shots in 17:01 worth of ice time in Thursday's 5-1 playoff win over the Maple Leafs.

Nash (upper body) has yet to resume skating, Joe Haggerty of NBC Sports Boston reports.

Nash, who was making his Bruins debut, recorded a team-high five shots on goal and a blocked shot in Sunday's 4-1 road loss to the Sabres, though he didn't get on the scoresheet through 17:27 of ice time.

Nash, who was acquired from the Rangers earlier Sunday, is set to join the Bruins in Buffalo and make his team debut later in the evening.

The Bruins officially acquired Nash from the Rangers on Sunday, John Shannon of Sportsnet reports.

According to Darren Dreger of TSN, the Bruins and the Rangers are finalizing talks to send Nash to Boston.

Nash (not injury related) will sit out a second straight game Friday against the Wild, Dan Rosen of NHL.com reports.

If he isn't traded prior to puck drop, Nash won't suit up for Friday's game against Minnesota, Brett Cyrgalis of the New York Post reports.