Lance Parrish hit a pair of homers and drove in three runs to lead the Detroit Tigers to a 5-3 victory over the Baltimore Orioles and a sweep of today's doubleheader.

Steve Kemp drove in four runs, two with a homer, and the Tigers scored five unearned runs in the fourth inning en route to an 8-2 victory in the opener.

Parrish, who started the day batting only .242, earned the wrath of the Detroit fans Saturday when he took three called strikes with the bases loaded in a Tiger defeat.

"This takes some of the pressure off both me and the rest of the ball club," Parrish said today. "Maybe, unconsciously, I've been pressing at the plate. I've been trying to modify my swing and now I'm seeing the ball better."

In the eighth inning of the second game, Parrish homered into the lower right-field stands. It was his second home run of the game and sixth of the season and came with Lynn Jones on base, snapping a 3-3 tie. Jones had forced John Wockenfuss, who had drawn a walk from reliever Tippy Martinez (1-1).

The sweep, which gave the Tigers a split of their four-game weekend series, put them back at .500 (20-20).

Detroit scored first in the second game. Baltimore starter Dave Ford issued successive walks to Champ Summers and Parrish in the second inning and both runners moved up on Rick Leach's sacrifice. Tom Brookens singled Summers home.

The Orioles took a 3-1 lead in the fourth. Benny Ayala singled and scored on Gary Roenicke's second double of the game. Roenicke moved to third on a fly ball and scored on Rick Dempsey's grounder. Dempsey scored from first on Al Bumbry's double.

Detroit got one run in the fourth when Parrish hit his first homer. In the Detroit fifth, Al Cowens doubled, Alan Trammell singled and Martinez relieved Ford and walked Kemp to load the bases with none out. Martinez struck out pinch hitter Wockenfuss before walking Summers to force Cowens home with the tying run. Parrish hit into a double play to end the threat.

In the opener, Detroit starter Dan Petry (2-3) gave up two runs on five hits in five innings to get the victory and Kevin Saucier was credited with his fourth save. Dennis Martinez (5-2) went 3 2/3 innings for Baltimore, giving up six hits and six runs, only one earned.

Rick Peters drew a leadoff walk in the Tigers' first, went to third on Trammell's double and scored on Kemp's grounder.

In the Tigers' big fourth inning, Al Cowens singled, was safe at second on an attempted steal when shortstop Mark Belanger dropped catcher Dan Graham's throw for an error, went to third on Bill Fahey's grounder and came home on Brooken's one-out double.

Brookens was caught trying to steal third but Martinez walked Lou Whitaker and Peters, who scored on successive singles by Trammell and Kemp. Steve Luebber relieved and yielded RBI singles to Richie Hebner and Summers.