WEST SACRAMENTO, Calif. — Jordan Walker had a solo homer and drove in the go-ahead run in the ninth inning to lead the St. Louis Cardinals to a 5-4 win over the Athletics on Thursday. Trailing 4-3, Iván Herrera tied the game with a single to left field that scored Thomas Saggese before Walker’s double put the Cardinals ahead. Nick Kurtz opened the scoring in the first with a solo home run for the Athletics. Victor Scott II homered in the fifth to tie the game tied at 1. Walker added his 12th home run of the year in the sixth inning to put St. Louis ahead 2-1, and Nolan Gorman followed with a single to right field for a 3-1 lead. The Athletics plan to move to Las Vegas in 2028, when they are scheduled to open play at a new ballpark on the Strip. Matt Svanson (1-1) pitched a scoreless eighth inning, giving up one hit and striking out two. Michael McGreevy got the start and threw six innings, giving up one run on five hits while striking out three.…