Florida Panthers star Matthew Tkachuk, who was hurt during the 4 Nations Face-Off, has gone on long-term injured reserve.

The defending Stanley Cup champion Panthers confirmed Monday, a few hours before Jones’ debut with the team, that Tkachuk is on long-term injured reserve with a lower-body injury. That means Tkachuk won’t be back for a few weeks — and possibly not until the postseason.

Dealing with a lower-body injury, Tkachuk has been ailing since the second game of the 4 Nations Face-Off when he missed the final 12:36 of a 3-1 win for Team USA over Canada. After having to sit out the final game of the round robin, Tkachuk took the ice for just 6:47 in a 3-2 overtime loss to Canada in the championship game on Feb. 20.