Newly acquired center Bill Derlago scored his first goal in a Boston uniform and Doug Keans turned aside 19 shots to lift the Bruins to a 2-1 win over the Minnesota North Stars last night in Boston.

It was a costly victory for the Bruins, who lost leading goal-scorer Charlie Simmer with torn ligaments in his right knee.

"The doctor seems to think that Simmer can avoid surgery, but he can't guarantee anything," said Bruins General Manager Harry Sinden. "He did mention a time span for recovery of at least six weeks."

Derlago, acquired one game into the season from the Toronto Maple Leafs in a trade for Tom Fergus, took a pass from Ken Linseman and beat goalie Don Beaupre for the game-winner on a power play midway through the second period.

Linseman's 20th assist of the season prolonged his consecutive-game scoring string to 15 games.

Derlago's goal broke a 1-1 first period deadlock as Minnesota's Neal Broten and Simmer traded power play goals.

In addition to Simmer, the Bruins lost Nevin Markwart (concussion), Alain Cote (pulled groin muscle) and Keith Crowder (cut over right eye), all for indefinite periods. Rick Middleton missed the game with muscle spasms in his right shoulder.