Lefties are hitting only .136 against Colorado starter Drew Pomeranz, so Mattingly figured it would be a good day to rest Ethier, who said he feels fine. Coming off a day game and with an off-day Thursday, Mattingly said this was the perfect time to give Ethier a breather to keep him fresh down the stretch.
He plans to do the same thing with Matt Kemp, Hanley Ramirez and Shane Victorino in the not-so-distant future.
"I don't want to do it all in one day where everybody is all of a sudden out of the lineup," Mattingly said. "I have to try to do it sporadically with a piece here and a piece there so I can keep the lineup intact."