Ferguson was recalled from Triple-A Oklahoma City on Tuesday.
Ferguson was sent down to the minors Thursday, but after Alex Verdugo (oblique) landed on the injured list, he was eligible to return to the big-league club. He's had a rough go of it with the Dodgers this season, accruing a 5.88 ERA and 1.81 WHIP with 32 strikeouts over 26 innings.