"We'll back off Clayton's next start for sure, but Zack wants more of a regular start," Mattingly said. "Zack had the calf thing [missing a start] and had a little rest and he looks like he wants a full start."
Greinke, the 2009 American League Cy Young winner and presumably the stronger NL Cy Young candidate of the two this year, already has a career-high 18 wins and leads the league with a 1.68 ERA and .857 winning percentage.
Kershaw, a three-time Cy Young winner, will be coming off his one-hit, 13-strikeout clinching masterpiece against the Giants.