Lance Parrish and Chet Lemon each hit a two-run homer yesterday to help the Detroit Tigers past the host Toronto Blue Jays, 7-4.

Parrish, who homered in both games of Friday's doubleheader, hit a two-out homer off Jim Clancy (14-8) in the first inning to give the Tiger catcher 24 homers and 99 runs batted in this season. The homer came after Lou Whitaker reached base on shortstop Alfredo Griffin's error.

Lemon hit his 22nd of the year in a three-run fourth. With two outs, Glenn Wilson singled and scored on Enos Cabell's bloop double. Lemon followed with his shot on a 3-0 pitch.

Dan Petry (15-8) ran into trouble in the sixth after having held the Blue Jays to two hits, including Willie Upshaw's 22nd home run in the fourth.

Dave Collins and Rance Mulliniks walked to open the sixth and a single by Lloyd Moseby loaded the bases.

Upshaw's force-out drove in one run and Jorge Orta's single made it 5-3. Petry escaped further trouble when Ernie Whitt grounded into a double play--the third of four double plays by the Tigers.

"Against this club you always have to bear down and try as hard as you can," said Lemon. "The Jays never quit. Even when we got up by five, they didn't quit."