Toronto Maple Leafs forward Nazem Kadri left Tuesday's matchup with the St. Louis Blues and did not return due to a concussion, the team announced. 

Prior to his exit, the 28-year-old was held off the score sheet in 4:14 of ice time. In 59 games so far this season, Kadri has 15 goals and 20 assists. 

"You know how these things go, we'll know more later," head coach Mike Babcock said during the game's broadcast before it was revealed he was dealing with a concussion.

Kadri will be re-evaluated on Wednesday.

Following their 3-2 overtime loss in St. Louis, Toronto will be back home on Thursday to take on the Washington Capitals.