Kemp was optioned to Triple-A Fresno on Monday.
Kemp was up with the Astros for a little less than a week while injuries to Jake Marisnick (concussion) and Teoscar Hernandez (knee) depleted the team's depth in the outfield. With Marisnick deemed ready to return from the 7-day disabled list, Kemp's services were no longer needed. The 25-year-old appeared in two games during his stay with the Astros, going 0-for-3 with two strikeouts.