Dodgers starter Zack Greinke, on the 15-day disabled list, is expected to start his minor-league rehab assignment Friday night for Class-A Rancho Cucamonga.

Greinke, who is four weeks removed from surgery to repair a fractured collarbone, threw 60 pitches in his last bullpen session and is hoping to reach 75 in his minor-league start. Barring any setbacks, Greinke could join the rotation as early as Wednesday against the Nationals at Dodger Stadium, according to the Los Angeles Times.