Brewers 4, Athletics 3 (10)
Yuniesky Betancourt doubled home Carlos Gomez with two outs in the bottom of the 10th to give Milwaukee the walk-off win.
Jean Segura had a two-run triple and scored on Aramis Ramirez's broken-bat single during a three-run eighth as the Brewers erased a 3-0 deficit to win for only the third time in 11 games. John Axford (2-3) pitched a hitless 10th for the victory.
Yoenis Cespedes went 3-for-5 with a pair of homers and knocked in all three runs for the Athletics, who had their four-game winning streak snapped. Pat Neshek (1-1) was tagged with the loss after surrendering Betancourt's double.
Cespedes had a two-run blast in the first and a solo shot in the sixth as Oakland built a 3-0 lead behind A.J. Griffin, who scattered four singles over seven scoreless innings before the bullpen coughed up the three-run lead in the eighth.
Sean Doolittle allowed three runs and three hits - including Segura's triple - on only four pitches before Ramirez delivered the tying run with a single off Ryan Cook. Brewers starter Kyle Lohse gave up three runs on seven hits in six innings to remain winless in his last seven starts.
GAME NOTEBOOK: Brewers LF Ryan Braun is among about 20 players Major League Baseball is preparing to suspend, according to a report by ESPN's "Outside The Lines." Tony Bosch, the founder of the Biogenesis clinic in Miami, reportedly has agreed to cooperate with investigators and will swear in an affidavit that he provided drugs to players. The report said MLB will seek a 100-game suspension against Braun, the 2011 NL MVP. ... Athletics RHP Bartolo Colon, who will start Wednesday's series finale, also has been linked to Biogenesis. He was suspended 50 games in August 2012 for testing positive for testosterone. ... Brewers RHP Marco Estrada, who suffered a strained hamstring in Monday's game, is unlikely to make his next scheduled start Saturday versus Philadelphia.