"I don't know if they will tell me," Mattingly said. "I already let Mike know that Kersh is good for two [innings], so he's set up. That's his regular day, so I expect him -- obviously he's going to pitch. But he's one of the guys that are going in there rested and really perfectly set up for that game."
Kershaw is 11-2 with a 1.78 ERA, has won eight straight starts and is fresh off of a 41-inning scoreless streak. His main competition for the NL start is Matheny's ace with the Cardinals -- Adam Wainwright -- who is 12-4 with a 1.83 ERA on the season.
"That's Mike's decision," Mattingly said. "We're not lobbying one way or another. I let him know how Kersh feels about it and that he's capable of going two innings. I'm sure Mike's got a lot of people calling. … We've kind of set ourselves up for whatever happens there, and I'd love to see him start, but that's not my decision."
Michael Lananna is an associate reporter for MLB.com.