Dombrowski told reporters on Saturday evening that the Phillies are placing Wheeler on the 15-day IL with a blood clot in his right shoulder, which is his throwing arm. As ESPN's Jeff Passan reported, the timeline for Wheeler's return is "unclear."

Phillies pitcher Zack Wheeler underwent a thrombolysis procedure to remove a blood clot in his right upper extremity, the club announced Monday, firmly putting the remainder of his season in doubt.

The Royals are still a longshot for the postseason, but meetings against the Nationals and White Sox last week at least helped them stay in the hunt.

The Phillies may still have a talented rotation in Wheeler's absence, but they know they're going to have to win in different ways than expected in the postseason.

As expected, the Mariners activated pitcher Bryce Miller ahead of his start tonight in Philly.