Dave Henderson and rookie Jamie Allen each drove in three runs yesterday in Toronto to lead the Seattle Mariners to an 11-2 rout that spoiled the return home of the American League East-leading Blue Jays before a Canada Day crowd of 36,572.

Jim Beattie (6-5) yielded 11 hits, struck out three and walked two in his first complete game this season. The victory was only the Mariners' third in the last 14 games, but evened their record at 3-3 for new Manager Del Crandall.

Henderson admitted revenge for a 19-7 loss to the Blue Jays Sunday was on the Mariners' minds.

"I think it's in the back of your mind when they beat you like that," he said. "You want to come back and win a few ball games and kind of even the score. This is the first one of these blowouts that we've had where we've been on the winning side."

Toronto closed to 2-1 in the second on Alfredo Griffin's bloop single, but Seattle broke open the game with five runs in the third, when Henderson hit a two-run homer. After RBI singles by Richie Zisk, Steve Henderson and Allen, Dave Henderson reached reliever Mike Morgan for his eighth homer.

After the game the Blue Jays said Morgan, who has tendinitis in his right shoulder, would be placed on the disabled list and replaced on the roster by pitcher Doyle Alexander, picked up two weeks ago after being released by the New York Yankees.