We've reached the point in the season, with roughly six weeks to go, when every injury has a chance to be a season-ender. So when the clear front-runner for NL Cy Young lands on the IL, it's nothing short of a gut punch.

Philadelphia's ace felt normal before his start on Friday against the Nationals, but reported some new symptoms after the outing.

Cy Young candidate hadn’t been his usual lights-out self in recent starts. Team executive Dave Dombrowski announced the medical diagnosis Saturday in DC.