Colon was optioned to Triple-A Omaha on Wednesday, Joel Goldberg of FoxSports.com reports.
Since the All-Star break, Colon has hit a mere .182/.250/.250, bringing his batting average down to .228 for the year. Apart from occasionally filling in if an infielder needed a day off, Colon didn't see consistent time on the field. With Colon headed to Omaha, the Royals recalled Scott Alexander.