Jack Flaherty of the Cardinals suffered an oblique injury on Monday and will miss an extended amount of games:

As we’ve all experienced as baseball fans, oblique injuries can be a few weeks if they are really mild and there are no setbacks, or they can turn into a nearly year-long affair as it has for Cubs reliever Rowan Wick. The sport is so rotational at the core – for hitters and pitchers, alike – that oblique strains present a unique risk of recurrence or setback. They suck.

BleacherNation.com

Flaherty pitched better than his 2.90 ERA as he held opponents to a .196/.277/.333 slash line this season. That type of performance is tough to replace.