A tough Edmonton defense and several costly penalties against the Montreal Alouettes gave the Eskimos a 17-9 victory and their second consecutive Grey Cup in the Canadian Football League championship today.

The usually high-scoring Eskimos managed only two touchdowns -- a 43-yard pass play from Tom Wilkinson to Waddell Smith in the first quarter and a 33-yard strike by Warren Moon to Tom Scott in the third quarter.

Scott's touchdown erased a 9-7 Montreal lead and then Moon moved the Eskimos close enough for a Dave Cutler 38-yard field goal on the last play of the third quarter.

But the Eskimos still only were eight points in front going into the fourth quarter and the Alouettes, led by running back David Green, kept threatening.

Time and again, however, the Als either were stopped by the so-called Alberta Crude Edmonton defense or by penalties.

The Montreal errors were capped with about two minutes left when Keith Baker ran back an Edmonton punt for what appeared to be a touchdown. But the Als were called back to their own 12-yard line because of a clipping penalty. The partisan crowd of 65,113 did not like the call and booed lustily.

Ronically, the Alouettes swept all three outstanding player awards. Green, the league's outstanding player on the season, rolled up 142 yards in 21 carries to win the game's MVP award; Don Sweet, who kicked three field goals, was named the most outstanding Canadian player, and former All-America Tom Cousineau from Ohio State was the most valuable defensive player.

Predictably, Edmonton came out throwing. Wilkinson directed the club 57 yards to the Montreal 16 on a 25-yard pass to Scott an 18-yard run by Jim Germany and an 11-yard pass to Brian Kelly. But on a third and one at the 16, Cousineau stopped Moon for no gain to snuff out the drive.

Cousineau stopped the Eskimos again midway through the second period when he intercepted Wilkinson at the Montreal 16 by ripping the ball out of Waddell Smith's arms.