The Dodgers will option Miller to Triple-A Oklahoma City on Thurdsay, Fabian Ardaya of The Athletic reports.
Miller gave up two earned runs in 2.1 innings during Wednesday's loss to the Reds and is now set to return to Triple-A to make room for Landon Knack, who will come up to pitch in Thursday's contest. Miller has allowed three earned runs in 5.1 innings with the Dodgers this year and will finish the season in the minors, barring an injury to one of Los Angeles' pitchers.