Neither team has plated a run in the first two extra innings, so the Cardinals head to the 12th inning in their contest with the Red Sox.
Boston had an opportunity in the tenth with Josh Rutledge reaching second base to lead off, but he was stranded there.
The Cardinals are doing fine on relievers, as they've only used four so far, but the Red Sox have gone through seven through 11 innings.
Cardinals head to extras with Red Sox
After Cardinals reliever Trevor Rosenthal gave up two runs in the eighth allowing the Red Sox to tie the game at four, neither team was able to put away the game in regulation.