With only six games left in the regular season, not much time is left for Horton to attempt a comeback, though the concussed forward is reportedly not expected to make a return to the lineup anytime soon.
Assuming that Horton misses the remainder of the regular season, he will have missed a total of 30 games with what was first determined to be a "mild" concussion.
The 26-year-old was suffered a blindside hit to the head from Philadelphia Flyers' Tom Sestito on Jan. 22, just eight months after sustaining a violent blow to the head by Vancouver Canucks' Aaron Rome during Game 3 of the Stanley Cup Finals.
Bruins GM Peter Chiarelli had first indicated that Horton would return at some point this season following his second concussion, but the club has since remained mum on his condition.
Team president Cam Neely answered via e-mail to CSNNE.com that there's "nothing to report" when asked about possibly shutting down the forward.
Horton was allegedly ready to return to the ice back in February, but he suffered a setback when he attempted to skate. He hasn't tried to skate since then, but he has been working out on his own over the last few weeks.
In 46 games this season, Horton has tallied 17 goals and 15 assists for 32 points, and 54 penalty minutes.