Horton, the No. 3 pick in last year's NHL draft, got tangled up
with Canucks defenseman Brent Sopel and slid headfirst into the end
boards with 36 seconds remaining in the first period.
The 18-year-old center tried to shield his face by holding up
his left arm as he hit the boards and appeared to jam his left
shoulder. After being attended to on the ice, Horton went to the
dressing room clutching his left arm tight to his body.
Horton has scored 10 goals, including four in his last four
games, to rank third on the Panthers and fifth among all NHL
rookies this season. He rang a shot off the inside of the post
midway through the first period.
Horton also became the youngest player to score on an NHL
penalty shot when he beat Philadelphia's Jeff Hackett on Thursday.