PITTSBURGH (Interstat) — Jordan Walker homered in a three-run first inning, and the St. Louis Cardinals completed a four-game sweep of the Pittsburgh Pirates with a 10-5 win Thursday at PNC Park.

St. Louis (18-13) pounded out 14 hits against Pirates ace Paul Skenes (4-2), who allowed five runs—four earned—over five innings while striking out nine. Alec Burleson drove in three runs with three hits, including an eighth-inning single that highlighted a five-run outburst.

Pittsburgh (16-16) managed seven hits, getting two RBIs from Bryan Reynolds and a solo homer from Brandon Lowe. The Pirates scored single runs in the fourth, seventh and ninth and two in the fifth, but never led.

Gordon Graceffo (2-0) threw 1 1/3 scoreless innings in relief for the win. Hunter Dobbins gave up three runs over 4 1/3 innings in a start for the Cardinals.

An announced crowd of 12,143 watched the 3-hour, 5-minute afternoon game. St. Louis scored one run in the third and another in the fifth before breaking open the game with five in the eighth.