Flaherty has an outside shot at cracking the Opening Day rotation but is likely to open at Triple-A Memphis, the Cardinals' official site reports.
Flaherty posted a 6.33 ERA in 21.1 innings in the majors last season, though it came with a more palatable 4.41 xFIP. In 148.2 innings split between Double-A Springfield and Triple-A Memphis, Flaherty recorded an impressive 2.18 ERA. He's still just 22, so the Cardinals will likely keep him in the minors to work on his secondary pitches.