ST. LOUIS (AP) — Jordan Walker homered and Zack Thompson tossed seven effective innings to lead the St. Louis Cardinals to a 6-4 win over the Pittsburgh Pirates. Nolan Gorman added a two-run single for the Cardinals, who avoided a three-game sweep. Alec Burleson broke a 3-all tie with a two-run single in the fourth. Miguel Andujar homered for the Pirates, who had their five-game winning streak snapped. Pittsburgh was looking for its first three-game sweep in St. Louis since May 1991. Walker gave the Cardinals a 3-1 lead with his 14th homer in the third. He also doubled and scored in the seventh. Thompson allowed three runs and seven hits on 92 pitches. He struck out six. Giovanny Gallegos earned his 10th save.