ST. PETERSBURG, Fla. – A single-game career high in hits. Four-for-five at the plate, opposite-field damage and a late-game go-ahead RBI single. Smooth dives and throws from third base; smoother picks at first. That wasn’t Brett Wallace during April. But that was Wallace during the Astros’ recent two-game series at St. Louis. Wallace was the best hitter at Busch Stadium on Wednesday, racking up four singles and giving the Astros a temporary 4-3 lead in the seventh inning. The Astros’ biggest disappointment the first two weeks of the season has turned into the club’s best surprise since June 25, when the 26-year-old Wallace was recalled from Class AAA Oklahoma City. [...]