With run support lacking for Michael Wacha in recent weeks, the 22-year-old starter seized his own opportunity to ensure that the Cardinals wouldn’t lose for a sixth straight time behind him. Wacha was timely with his first hit of the season, a two-run, two-out single that extended what would become a four-run second. It helped lift the Cardinals to a 5-3 win and series victory over the Cubs in front of 42,501 at Busch Stadium on Thursday.