Svanson was charged with five runs on six hits and a walk over one inning of work in Saturday's loss to the Red Sox.
Svanson retired the final two batters in the top of the eighth inning to keep the Cardinals' deficit at 2-0. He remained in for the top of the ninth after Boston's lead had been cut to one but yielded six consecutive one-out singles as the visitors effectively put the game away. Svanson came into the season as part of the high-leverage picture, but he might need a reset in the minors after posting a 15.58 ERA and 7:6 K:BB over his first 8.2 innings.