The Dodgers optioned Knack to Triple-A Oklahoma City on Wednesday.
Knack has posted a 3.47 ERA and 1.07 WHIP while striking out 26 batters in 23.1 innings since joining the Dodgers on June 21, but he will head back to the minors following the returns of Tyler Glasnow (back) and Clayton Kershaw (shoulder) from the injured list this week. Should Knack continue to pitch effectively in the minors, he could still be called upon to re-enter the Dodgers rotation if injuries continue to test the big club's starting pitching depth.