In their stead, there have been mixed results. Mike Bolsinger has been dominant in his four starts -- posting a 3-0 record with a 0.71 ERA, including an eight-inning, one-hit gem Saturday.
After Sunday's outing, Frias' ERA for the season rocketed to 5.34. The Dodgers' record is 2-3 on the year when he starts.
The Dodgers have an off-day Thursday before starting a seven-game road trip to St. Louis and Colorado. The team will be allowed to bring one more player on the trip, due to a day-night doubleheader Tuesday against the Rockies.
"We haven't really talked about the doubleheader yet," manager Don Mattingly said. "We don't plan on moving anyone up [before the doubleheader]. We're going to keep everyone in place. If there are extra days in place, we'll give everyone an extra day."
Right-hander Joe Wieland is scheduled to start Thursday for Oklahoma City, and he is one of the options the Dodgers could call up. Wieland made one start this year, on May 6. Wieland made it through 4 2/3 innings and gave up six earned runs. He is 4-1 in the Minors, but his ERA is 4.76.
The Dodgers also have a pair of options with Major League experience, both of whom are rehabbing from injury.
Veteran Erik Bedard signed a Minor League contract with the Dodgers over the offseason, but promptly strained his back in the first inning of a Spring Training start on March 21. Bedard, 36, made his first rehab start for Class A Advanced Rancho Cucamonga on Monday. Bedard allowed three runs in the first inning, but settled down with three scoreless innings before being pulled after four. He threw 62 pitches.
Since Monday was Bedard's first rehab start, Mattingly said he hadn't heard much regarding the veteran's status.
"Haven't gotten a whole lot," Mattingly said. "As soon as he gets close, then we'll start getting reports, and we'll make some decisions."
Another option includes Brandon Beachy. The 28-year-old has a career ERA of 3.23 during four seasons with Atlanta. Beachy is attempting to come back from a second Tommy John surgery and has thrown two simulated games over the past two weeks. Mattingly said Beachy will be going to the Dodgers' Spring Training facility at Camelback Ranch to continue throwing simulated games when the team heads on the road Friday.