In the second of two games between longtime National League Central rivals, the Cardinals and Houston Astros are scoreless through four innings at Busch Stadium.
In the team's first meeting since 2013, the Astros' first season as an American League club, Houston took the series opener 5-2 on Tuesday, getting a solid pitching effort as well as a two-run, two-out single in the seventh from starter Doug Fister.
Through six innings, Adam Wainwright has allowed three hits and two walks _ erasing one runner with a double play and another with a caught stealing _ and has struck out six.