Ryu (1-0) rebounded from a rocky season debut to shut down Oakland. He struck out eight and walked one, handing off to the bullpen after just 90 pitches. Ryu also walked and singled in two plate appearances.
Manaea gave up seven hits and two runs over five innings. He has a 1.74 ERA through three starts.
Los Angeles has won two straight since dropping four in a row. Oakland has lost four of five, with four games left on their eight-game trip.
Los Angeles Rams running back Todd Gurley threw out the ceremonial first pitch.
A's: Oakland sent C Josh Phegley (finger) on a rehab assignment to Class A Stockton. ... Injured INF Renato Nunez (strained left hamstring) is rehabbing at Triple-A Nashville and close to returning. He could be recalled as early as Saturday.
Dodgers: Injured 3B Justin Turner (broken left wrist) did some light throwing before the game but is not hitting yet.
A's: RHP Daniel Mengden (0-2, 6.55) pitches for Oakland in Wednesday's series finale.
Dodgers: After having his start pushed back one day due to food poisoning in San Francisco over the weekend, Alex Wood (0-1, 1.93) makes his third start of the season.