"It was good having him back there and getting back in sync," Lohse said. "Spring Training is about working out the kinks, and there weren't too many kinks to work out."
After allowing a leadoff single, Lohse retired 11 batters in a row until a harmless single by Stephen Vogt in the fourth inning. Lohse stranded Vogt, returned for the fifth inning and exited after issuing a one-out walk to Mark Canha that sparked a three-run Oakland rally.
Tyler Ladendorf put the A's on the board with an RBI single against Brewers reliever Neal Cotts, and Billy Burns followed with a game-tying sacrifice fly. Two batters later, the next Brewers reliever, Rob Wooten, made an errant throw on a pickoff attempt to third base that gave Oakland a 3-2 lead.
In a matchup of Opening Day starters, Lohse was charged with one earned run on two hits and one walk while recording three strikeouts in 4 1/3 innings. Gray allowed two runs on six hits and no walks and struck out four batters in four innings.
"Sonny Gray is really good, and he made one mistake up to me out of all the pitches he threw me," Lucroy said. "Everything else was down, down, down, and he made great two-strike pitches. He's very successful, obviously."
Barry Zito pitched four scoreless innings in relief, allowing one hit and no walks while striking out one.
For the Brewers, Ryan Braun returned from a two-day illness and went 0-for-3 with two strikeouts. He's 0-for-10 this spring.
Up next for the A's: Right-hander Kendall Graveman, acquired in the Josh Donaldson trade, gets a start against the Dodgers at Camelback Ranch on Monday, with first pitch scheduled for 1:05 p.m. PT. The A's rotation candidate impressed in his first two starts, allowing just one run over a combined five innings. Ben Zobrist, Billy Butler and Marcus Semien are among those slated to play behind him.
Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.