De Leon, 24, has a 2.70 ERA and 22:2 K:BB ratio over his last three starts for Triple-A Oklahoma City, a span of 20 innings.
Though Clayton Kershaw is supposed to return soon, Rich Hill has still not made his Dodger debut since being acquired from the A's, and Julio Urias appears resigned to a bullpen role for now. As such, it would be a surprise if De Leon did not make his big league debut before the end of the 2016 campaign.