Ethier got his first homer this spring by launching a long drive over the center-field wall. Carl Crawford walked and Hanley Ramirez singled before Ethier homered.
"I just squared one up," said Ethier, who is hitting .320 over nine spring games. "It's about time I squared one up. But it's good. It just adds to what I've been trying to do this spring. It's part of the progression. Early on, I didn't want to hit too many balls with too much power. This is one step in the process."
Parker allowed four hits and struck out five in 4 2/3 innings.
"I got a little more aggressive," Parker said. "I got comfortable and so I was able to move the ball around, get to my changeup, throw it for a strike and finish when I needed to."
Hyun-Jin Ryu, who will start on March 23 in the Dodgers' season-opening series against Arizona in Australia, worked five innings. He struck out four and allowed three hits, including a home run to Michael Taylor in the fifth.
After reliever Brandon League gave up a two-run homer to A's third-baseman Josh Donaldson in the sixth, the Dodgers scored four runs in a seventh inning led by Miguel Olivo's three-RBI double. The A's tied it up in the eighth with five runs off six hits against three Dodger pitchers, including Brian Wilson, who was finished after throwing 13 pitches.
Dodgers manager Don Mattingly and trainers went out to the mound to speak to Wilson after facing his first hitter, Addison Russell, who doubled. Mattingly said that Dodger pitching coach Rick Honeycutt saw a possible injury.
"I think he's OK," said Mattingly, who had planned to limit Wilson to 15 pitches anyway. "I went out there, because Rick said he thought he saw something. Brian said he wasn't hurting anywhere. He's sounds fine."
Parker is considered the leading candidate to start opening day March 31 against Cleveland in Oakland. Scott Kazmir and Sonny Gray are also possibilities. Parker says he'd love to start, but he isn't worried about it.
"I'm working to get ready for the season, no matter when I pitch," he said. "As long as I'm healthy and good to go."
Dodgers: Ryu threw 69 pitches in his third spring-training appearance.
"I used all of my pitches and built up my pitch count," Ryu said through an interpreter. "I'm very satisfied with my command. Everything was down in the zone."
Copyright by STATS LLC and The Associated Press
GLENDALE, AZ - MARCH 10: Starting pitcher Hyun-Jin Ryu #99 of the Los Angeles Dodgers pitches against the Oakland...