The Royals recalled Kowar from Triple-A Omaha on Tuesday, Anne Rogers of MLB.com reports.
Kowar and James McArthur will both come up from the minors to make up for the departures of Scott Barlow and Ryan Yarbrough at Tuesday's trade deadline. With a 9.83 ERA and 2.13 WHIP through 57.2 career MLB innings, Kowar offers very little fantasy value.