Hendrix struck out the side in the fourth inning of Saturday's spring game against Seattle.
Hendrix signed a minor-league contract with the Diamondbacks on Tuesday, which includes an invitation to spring training, the pitcher announced.
Hendrix elected free agency Thursday, C. Trent Rosecrans of The Athletic reports.
Hendrix cleared waivers and was outrighted to Triple-A Louisville on Friday.
The Reds optioned Hendrix to Triple-A Louisville on Wednesday.
Hendrix was recalled from Triple-A Louisville on Friday, Mark Sheldon of MLB.com reports.
The Reds optioned Hendrix to Triple-A Louisville on Monday.