Lupul returned to the lineup Saturday after missing one game due to injury, but left after two periods. He has 22 goals and 44 points in 69 games this season.
"He is going to have surgery done on his knee," coach Randy Carlyle said. "It's a meniscus procedure and will be done arthroscopically. It will be three weeks to a month recovery."
The Maple Leafs, who begin a three-game road trip to end the regular season Tuesday at the Tampa Bay Lightning, are three points behind the Columbus Blue Jackets for the Eastern Conference's second wild-card spot in the Stanley Cup Playoffs. The Blue Jackets also hold a game in hand.
I'm just excited about the opportunity. I've been on the ice earlier than usual and in the weight room, pushing around a little more weights than usual. Every day I go into a workout with a smile on my face and ready to go. When you do have a little more responsibility, you want to take your lunch pail and get ready to work.
— Brian Elliott to Jeremy Rutherford of the Post-Dispatch on being the Blues' No. 1 goalie