De Leon will not start Friday against the Rockies, Ken Gurnick of MLB.com reports.
It's uncertain if or when De Leon will start again this season. With both Brett Anderson (finger) and Scott Kazmir (neck) slated to return to the rotation this week, De Leon may be relegated to bullpen duty the rest of the way, although the Dodgers could rest some of their top starters late next week if they secure the NL West crown.