The Calgary Flames revealed some disturbing injury news Friday afternoon upon touching down on the West Coast.

Centre Mikael Backlund, 23, is out with a Grade 2 sprain of the medial collateral ligament in his knee suffered in Thursday’s 4-3 overtime victory over the Columbus Blue Jackets.

Arguably playing the best hockey of his young career, Backlund has three goals and four points this season in eight games playing primarily with Lee Stempniak and Curtis Glencross.

He is expected to miss four to six weeks.

To fill his spot on the roster, the Flames recalled centre Ben Street from their No. 1 farm team, the American Hockey League Abbotsford Heat. In 115 career AHL games, Street has 51 goals and 60 assists for 111 points.

Street, 25, hails from Coquitlam, B.C. The five-foot-11, 185-pounder is expected to make his NHL debut Saturday night when the Flames visit the surging Vancouver Canucks.