The Dodgers optioned Knack to Triple-A Oklahoma City on Friday.
Knack was recalled Thursday and went on to log four shutout innings against Cincinnati in the series finale. The 28-year-old will head back to Oklahoma, where he sports a 2.08 ERA, 1.17 WHIP and 33:11 K:BB over 34.2 innings this season. His major-league stint will come to an end with Edwin Diaz (neck) being activated from the 15-day injured list.