The Chicago White Sox are slumping at the worst time.
Longoria hit a tiebreaking homer in the ninth inning and Tampa Bay gained ground in the wild-card race with its eighth consecutive victory, handing the White Sox a 3-2 loss on Thursday night that damages Chicago's playoff hopes.
"The belief has never gone away. We've felt like we had a good chance to be a playoff team from the beginning of the year," Longoria said. "The pressure is not on us playing from behind. It's not ours to lose, it's ours to win. We're behind, but we're close enough."
The Rays pulled within two games of Oakland for the second AL wild card, while the White Sox fell two games behind Detroit in the AL Central after their eighth loss in nine games. Tampa Bay and Chicago have six games to go, including three more against each other.
The Athletics lost 9-7 to Texas and the Tigers beat Kansas City 5-4 earlier Thursday.
The White Sox struggled to hit with runners on base, a recurring theme during their recent slide. They are hitting .123 with runners in scoring position over their last 10 games.
They twice had the bases loaded and no outs Thursday night but managed just two runs. And then they failed to get down a bunt and made a major baserunning gaffe when they had the potential go-ahead run on base in the eighth.
"There ain't nobody to blame. I think everybody in here will take accountability for the way we've played," Chicago starter Jake Peavy said.
"We had it right there in front of us a lot tonight and throughout the last week and a half, just hadn't been able to capitalize on either side of the ball. We've tried to pitch well enough to give us a chance and just hadn't been able to do that quite enough and obviously offensively it's been frustrating here for the last little bit."
Longoria's 14th homer came on the eve of the anniversary of his dramatic shot that beat the Yankees on the final day last season and gave the Rays the AL wild card. Now they're hoping for a repeat performance.
"It's one game. I hate to bring down the mood, but it doesn't put us ahead," Longoria said.
"It brings us a little bit closer, but it doesn't guarantee anything. It's a good moment for us, good moment for me, but bottom line is it's just one game."
Joel Peralta (2-6) pitched an inning for the win and Fernando Rodney finished for his club-record 46th save in 48 chances. After giving up a two-out single to Kevin Youkilis, Rodney struck out Adam Dunn on a 3-2 pitch to end the game.
"We have to get back to our DNA, which we're starting to do," said Tampa Bay manager Joe Maddon, who earned his 600th career win, including a 19-10 interim stint with the Angels in 1999. "Great pitching, not just good defense -- great defense. We have to be great on defense. The fortuitous hit, the clutch hit has to show up for us to get back there."
Brett Myers (3-4) gave up Longoria's homer while pitching 1 2/3 innings. The right-hander has allowed a run in each of his last two outings after a run of six consecutive scoreless appearances.
The White Sox wasted a handful of opportunities to grab control of the game.
A.J. Pierzynski led off the eighth with a single. Pinch hitter Dewayne Wise then struck out after failing out to get down a bunt and pinch runner Jordan Danks was ruled out on a double play on Alexei Ramirez's fly ball when he failed to retouch second base on his way back to first. Chicago left 10 on base.
"We didn't do the little things. Tonight we had an opportunity to get a guy in scoring position and didn't do it," Chicago manager Robin Ventura said.
"Over the course of the last week or so, we're not doing small things to win games. We have bases loaded, we only get one. Over the course of time that just builds up and it's difficult on your pitching staff to do that over and over again."
Paul Konerko hit into a double play with the bases loaded in the fifth, tying it at 2.
Luke Scott started the fifth with a drive off Peavy for his 14th homer, giving Tampa Bay a 2-1 lead.
Carlos Pena had a sacrifice fly for the Rays in the fourth, but the White Sox tied it in the bottom half when James Shields walked two and gave up a single to Alex Rios to load the bases with no outs. One out later, Shields hit Dayan Viciedo with a pitch to force in a run, then retired the next two batters to avert the big inning.
Shields gave up six hits in 6 1/3 innings, throwing 117 pitches. He struck out six and walked four.
Peavy went 7 1/3 innings, leaving after walking pinch hitter Sam Fuld. He gave up four hits, struck out six and walked one.
The White Sox still have not named a starter for Sunday's series finale to oppose Rays ace David Price. Jeremy Hellickson (9-10) goes for Tampa Bay on Friday against Gavin Floyd (10-11) and Saturday it's Matt Moore (10-11) vs. Chicago's Chris Sale (17- 7). ... Rays C Jose Molina (right quad strain) missed a second straight game. Maddon said "he's doing better," but isn't sure when Molina will be able to return to action. ... Dan Johnson, who homered for Tampa Bay to tie the game with the Yankees on the final day last year, is now a reserve with the White Sox and lined out in the ninth Thursday night. "It's very strange that Danny's over there," Maddon said. "Great guy. He's a big part of Devil Ray/Ray history. ... I know how calm he is in big moments."