The A's leaned on pitching and defense to win for the ninth time in 11 games and move five games over .500 for the first time this year. They did not clear the fences, ending their major league record streak of hitting a homer in 27 road games.
Lowrie did his part at the plate again with a game-winning RBI for the third straight game. He drove in a tiebreaking run in the top of the ninth inning the previous two wins against the Tigers.
Bassitt (1-3) gave up two hits and five walks while striking out five. He had lost nine straight since his last win in the majors in 2015.
Yusmeiro Petit entered in the seventh for his first of two innings and Jose Iglesias, the first to face the reliever, hit an infield single his stolen base was over turned by video review. Lou Trivino pitched the ninth for his second save in three chances, sealing the shutout.
Mike Fiers (5-5) allowed a run on five hits and one walk over seven innings.
Joe Jimenez kept Detroit within a run in the eighth before the A's gave themselves a bigger cushion against Alex Wilson. Josh Phegley and Dustin Fowler hit RBI doubles in the ninth off Wilson, putting Oakland ahead 3-0.
Athletics: RHP Trevor Cahill, on the 10-day disabled list with a strained right Achilles tendon is scheduled for another bullpen Friday.
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Tigers manager Ron Gardenhire was ejected after the third inning for arguing with home plate umpire Lance Barksdale.
The A's put RHP Daniel Mengden on the 10-day DL, retroactive to June 25, with a sprained right foot and recalled Bassitt from Triple-A Nashville. Mengden (6-6) has started 16 games, tying LHP Sean Manaea for the team lead.
Manaea (7-6) will be pitching to help his team sweep the four-game series while Detroit counters with RHP Michael Fulmer (3-6).