Center Butch Goring, the New York Islanders' castoff who was claimed by Boston earlier this week, scored the go-ahead goal in support of a pair of unassisted, shorthanded efforts by Steve Kasper as the Bruins defeated the Maple Leafs, 5-3, last night in Toronto.

Goring, playing his first game for Boston since being claimed on waivers from the Islanders Tuesday, gave the Bruins a 4-3 lead at 10:29 of the period when he lifted a shot into the net from a goalmouth scramble.

The loss was the seventh in a row for the Leafs, dropping their record to 6-30-5. The Bruins have lost just once in their last eight games.

Kasper took advantage of early first-period giveaways by Toronto to score his shorthanded goals in a 50-second span.

With Bruins defenseman Frank Simonetti penalized for two minutes, Kasper intercepted a stray pass and slipped a backhand shot past goalie Rick St. Croix at 1:57. On the same penalty-killing shift, Kasper broke in alone to get his 12th goal of the season and his fourth shorthanded effort for a 2-0 Bruins lead.

St. Croix, who injured a hamstring muscle while attempting to save Kasper's second goal, left the ice on a stretcher and was replaced by Tim Bernhardt.

A Maple Leaf Gardens usher, Russell Lattimer, threw his hat and jacket on the ice during the game to signal he was quitting his part-time job in protest of Harold Ballard's anti-Soviet scoreboard dig last week.

Last Friday during an exhibition hockey game between the Canadian Olympic team and Moscow Dynamo, a top Soviet club team, Ballard, owner of the Gardens, displayed a sign on the electronic scoreboard reminding the 7,500 spectators of a Sept. 1, 1983, attack in which Soviet fighter pilots shot down a Korean Airlines flight, killing 269 people, including 10 Canadians. Ballard advised fans to boo, not cheer.