It doesn’t seem to be a particularly serious issue. Anne Rogers of MLB.com relays (0n Twitter) that the Royals are hopeful Greinke may only have to skip one turn through the rotation thanks to the upcoming All-Star Break. That suggests a minimal IL stint is a possibility, though he’ll meet with a doctor tomorrow to determine the next steps in his recovery.
Greinke’s absence is unlikely to change the Royals’ fortunes much. At 25-61, Kansas City looks ticketed for a last-place finish in the AL Central and a bottom three showing in MLB. It could have some implications for the trade market if he’s not able to return around the time he’s first eligible. Greinke is respected enough to draw some attention from other clubs this summer, even as he carries a 5.44 ERA thanks to a pair of clunkers in his last three starts.
Players on the injured list can still be traded, so Greinke would be able to move even if he’s not back on the mound by August 1. That seems unlikely, though, especially since K.C. would probably only move him if the six-time All-Star seeks a trade. Greinke has signed with the Royals on successive one-year contracts the past two seasons, preferring to return to the place where he began his career over two decades ago. He is playing this season on an $8.5MM salary and could almost double that mark via an innings-based incentive package.