The Dodgers swapped relievers on Monday, activating Sergio Romo and sending Josh Fields to triple-A Oklahoma City.
Fields was unscored upon in his first eight appearances this season and carried an earned-run average below 1.00 into the first week of June. However, in his last five appearances, he has given up seven runs — including five home runs — in 4 2/3 innings.
Romo has not pitched since June 4 because of a sprained ankle. He has a 6.41 ERA in 24 appearances this season.
First baseman Adrian Gonzalez received an epidural injection to combat the discomfort stemming from the herniated disk in his back, manager Dave Roberts said.