Flaherty (oblique) fired two scoreless innings in Triple-A Memphis' loss to Gwinnett on Tuesday, allowing a hit and recording three strikeouts.
As his line indicates, Flaherty passed his first rehab test with flying colors, throwing 21 of 31 pitches for strikes. The right-hander is likely due for at least two more appearances with the Redbirds, considering the Cardinals will likely want him built back up to the 70-to-75-pitch range before activation is considered.