Bauers lifts Rays over A's, who fail to close on YanksOakland Athletics' Matt Chapman, right, shakes hands with third base coach Matt Williams after Chapman hit a home run off Tampa Bay Rays pitcher Sergio Romo during the ninth inning of a baseball game, Saturday, Sept. 15, 2018, in St. Petersburg, Fla. (AP Photo/Chris O'Meara)
Oakland remains 1 1/2 games behind the Yankees for the top AL wild card after New York lost to Toronto earlier in the day. The A's, who have dropped two of three since winning six straight, fell 3 1/2 games behind Houston in the AL West.
Bauers' homer was just the second allowed by Familia (4-2) since he was acquired by Oakland on July 21 from the Mets.
It came a few minutes after Oakland manager Bob Melvin was ejected by home plate umpire Larry Vanover for arguing a third-strike call on Marcus Semien in the top of the eighth.
Bauers, who busted a 4-for-65 slump with three hits and four RBIs, celebrated his 11th homer with a big flip of the bat.
''It's nothing to do with disrespect or showing people up or anything like that. It's just purely letting a lot of pent up emotions out,'' he said. ''The homer felt great, the bat flip felt better.''
Andrew Kittredge (2-2) retired Mark Canha with the bases loaded in the eighth to preserve a 4-4 tie and win a game in which both teams used relievers as openers. Tampa Bay and Oakland have been at the forefront of that trend this season.
''Oakland's playing for an awful lot right now,'' Rays manager Kevin Cash said. ''Every game, they put themselves in a situation where they're playing for a wild card home field. They've been on a nice run. It makes all the sense in the world how aggressive they're being.''
Oakland's big chance came in the eighth. Before Canha grounded out, Semien was called out on strikes with the bases loaded.
''I mean, everyone sees the box,'' Semien said. ''I looked at the box on the computer and it was not in the strike zone. That's the facts. That's what I saw on our computer.''
Melvin, who was ejected for the second time this season, saw it, too.
''The closer we get to the end, the more emotional we're going to be,'' he said. ''He's trying to grind through that at-bat and drive in the go-ahead run, and you feel like he gets a (strike) call that's not a strike. ... It happens.''
Brandon Lowe hit a two-run homer in the second to put Tampa Bay ahead, and Jed Lowrie made it 2-1 in the third with a single off Yonny Chirinos. Chirinos then retired 10 in a row before Matt Olson tied it in the sixth with his 27th home run.
Kevin Kiermaier hit an RBI triple and scored on Bauers' sacrifice fly for a 4-2 lead in the sixth, but Canha's pinch-hit double helped the A's tie it at 4 in the seventh.
Tommy Pham's 17-game hitting streak came to an end for the Rays, who have won 10 of 13.
FOUR TEAMS WINNING 100 GAMES?
With two weeks left in the season, the A's, Astros and Yankees could join the Red Sox as 100-win teams. Never before have three teams from the same league - or four teams from both leagues - won 100 games in the same season.
''There seems to be, at least in our league, more powerhouses this year than in the past, maybe a little less parity,'' Oakland manager Bob Melvin said. ''The only thing I would really take from that is that if you went into the season and looked at those (other) three teams that might win 100 games, you almost expected them to.''
Athletics: OF Chad Pinder was in the leadoff spot after stumbling over the bullpen mound while chasing a foul ball Friday night.
Rays: Cash said Romo is fine after the reliever ''dinged his knee up a little bit'' while working a perfect ninth inning Friday night. ... INF Daniel Robertson, rehabbing after season-ending left thumb surgery, resumed taking grounders at second base and shortstop.
RHP Mike Fiers (5-0, 2.72 in seven starts since being acquired from Detroit) will pitch Sunday's series finale for the A's. RHP Diego Castillo, who started Friday night's game for the Rays and pitched two innings, will start again Sunday.
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