Paramedics tend to injured Minnesota Wild defenceman Kurtis Foster on Wednesday night. ((Marcio Jose Sanchez/Associated Press))

Minnesota Wild defenceman Kurtis Foster underwent season-ending surgery Thursday to repair a broken left leg.

Foster, 26, suffered a fractured left fibula in a collision with rookie forward Torrey Mitchell in Wednesday's 4-3 shootout loss to the San Jose Sharks at HP Pavilion.

"He was playing his best hockey," Wild head coach Jacques Lemaire said.  It is a big loss."

Foster was racing Mitchell to the puck behind the Wild net when he was bumped, lost his balance and smacked hard into the end boards.

"I was just trying to get to the puck first," Mitchell said. "We collided and, obviously, it was unintentional.

"You never want to hurt anyone. I hope he is OK."

Foster remained prone for 12 minutes as medical personnel fitted him with a leg splint and strapped him to a backboard.

At one point, he screamed as the leg was treated.

"Seeing Foster like that, you don't want to see anyone get hurt like that," Wild defenceman Kim Johnsson said. 

Foster moved his head and talked to paramedics as they removed him from the ice 5:18 into the second period.

Mitchell received a two-minute penalty for tripping.

"It wasn't one of the best games refereed this year," Lemaire said.

Foster has posted seven goals and 11 assists for 18 points in 55 games this season, his fifth in the NHL.

The Carp, Ont., native has totalled 20 goals and 70 points in 175 games with the Atlanta Thrashers and Wild since being taken in the second round (40th overall) in the 2000 NHL draft.

With files from Associated Press