Yermin Mercedes extended his early tear with three more hits, Carlos Rodon struck out nine and the Chicago White Sox held the Seattle Mariners to three hits in a 6-0 victory Monday night.
Yasmani Grandal hit his 150th homer, driving in three runs and scoring twice to help Chicago snap a two-game skid.
Rodon (1-0) allowed two hits over five innings in his first appearance of the season. Michael Kopech followed with five strikeouts over two innings, allowing a walk and a hit, and Jose Ruiz closed it out with two perfect innings.
Rodon wasn't totally sharp. He allowed a runner to reach third with an errant pickoff attempt, walked three consecutive batters in the fourth inning for Seattle's most significant scoring threat and hit two batters with pitches. But the outing showed promise.
Left-hander Justus Sheffield (0-1) allowed six runs - four earned - and eight hits in five innings. He walked two and struck out five. He was stung by third baseman Kyle Seager's fourth-inning bobble of a potential double-play ball on a grounder by Grandal.
The White Sox scored three runs in the inning with RBIs from Andrew Vaughn and Billy Hamilton. They added two more in the fifth on Grandal's two-run single.
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