Toronto Maple Leafs winger Kasperi Kapanen is out with a concussion, the team announced Wednesday.

Kapanen was held out of Monday's game versus the Tampa Bay Lightning for precautionary reasons, and there's no timeline for his return as of yet.

The Maple Leafs have been hit hard with injuries lately, as defensemen Jake Gardiner and Travis Dermott are currently sidelined, while center Nazem Kadri recently missed eight games due to a concussion of his own.

Kapanen has been an important contributor for Toronto this season and was skating alongside Auston Matthews before the injury. The 22-year-old is in his first full NHL campaign and has recorded 19 goals and 23 assists.