Ken Kravec held Baltimore scoreless for seven innings tonight as his Chicago White Sox teammates built a 12-run cushion and went on to defeat the Orioles, 12-4, at Comiskey Park.

It was the first time Chicago had defeated the Orioles at home since September 1977.

Kravec picked up his seventh win in 11 decisions with relief help from Rich Hinton and home runs by Wayne Nordhagen and Claudell Washington. The Orioles touched Kravec for four runs in the eighth before Hinton took the mound. Hinton retired the side in order in the ninth.

Chicago scored seven runs in the second inning to hand Baltimore starter Mike Flanagan his fifth loss against seven victories. Chet Lemon drove in two runs in that inning with a bases-loaded single.

Greg Pryor doubled home the game's first run in the second inning after Eric Soderholm had walked and Nordhagen had reached first on Oriole third baseman Doug DeCinces' error. After twice attempting to bunt the runners along, Pryor drove a two-strike Flanagan pitch off the base of the left-field wall.

Pryor's hit stretched his consecutive-game hitting streak to 10.

Despite the loss, the Orioles remained a game ahead of the Boston Red Sox in the American League East. The loss snapped a six-game Oriole winning streak.