De Leon is in camp with the mentality that he's competing for a spot on the 25-man roster, the Dodgers' official site reports.
De Leon made 23 starts between Double-0A Tulsa and Class A Advanced Rancho Cucamonga last year, posting a 2.99 ERA and nearly 13 strikeouts per nine innings. He's likely set to open in Triple-A, but a 2016 MLB debut is very possible.