Cardinals sweep Pirates to gain ground in playoff push

St. Louis Cardinals’ Kolten Wong returns to the dugout after leading off the first baseball game of a doubleheader with a solo home run off Pittsburgh Pirates starting pitcher Trevor Williams in Pittsburgh, Friday, Sept. 18, 2020. (AP Photo/Gene J. Puskar)

St. Louis Cardinals’ Dylan Carlson celebrates as he heads to the dugout after hitting a three-run home run off Pittsburgh Pirates relief pitcher Chris Stratton during the sixth inning of the second baseball game of a doubleheader in Pittsburgh, Friday, Sept. 18, 2020. (AP Photo/Gene J. Puskar)

PITTSBURGH — Cardinals rookie Dylan Carlson’s three-run homer capped a six-run outburst in the sixth inning against the mistake-prone Pittsburgh Pirates on Friday night, helping lift St. Louis to a 7-2 victory and a doubleheader sweep.