DETROIT -- It might have just gotten tougher for the Detroit Tigers to hold off the surging Minnesota Twins in the AL Central.
"I'm out for the year," Polanco said.
Polanco was put on the disabled list on Aug. 16 with a separated left shoulder after making a tumbling catch at Boston. He was expected to be out four to six weeks.
Polanco recently started to hit and was sore after batting practice Saturday, Tigers manager Jim Leyland said. Polanco did not hit before Sunday's game.
If Polanco is out for the season -- and not just reacting emotionally to a possible setback -- it would be a blow to the slumping Tigers. Team trainer Kevin Rand said Polanco still has day-to-day status, according to team spokesman Rick Thompson.
Since leading the AL Central by 10 games after play on Aug. 7, Detroit has lost 24 of 37 games and seen its lead almost vanish.
"That our lead was 10 games in August is irrelevant now," said Sean Casey, whose two-out, two-run homer in the eighth inning made it 8-all. "We can't do anything about that now."
The Tigers, who haven't been to the playoffs since 1987, can do something about their postseason positioning this week.
Detroit opens a three-game series Monday on the road against the third-place White Sox, who might end up competing with the Tigers for the AL's wild card if they can't stop their slump. The White Sox are five games behind.
"Things are tight for us, but they're tight for Minnesota and Chicago, too," Casey said. "It's fun.
"This is what you play for, to go to Chicago in September with games that mean something."
It was difficult to tell the Orioles -- who had lost 14 of 18 to fall a season-high 22 games under .500 -- had only pride on the line in the series finale at Detroit.
Miguel Tejada hit a tiebreaking single to spark a four-run 10th inning for the Orioles, who lost a 4-1 lead in the fourth.
"That was a real battle," Baltimore manager Sam Perlozzo said. "I give each club credit. They both went out there and fought like they were in a pennant race.
"Our guys just kept battling away. They just kept going. I've been saying that all along. I'm proud of them."
Brian Roberts led off the 10th with a single, advanced on a wild pitch and scored on Tejada's hit. The Orioles added three more runs off Jason Grilli (2-3).
Chris Ray (2-3) pitched 2 1/3 innings and earned the win after blowing his fifth save in 36 opportunities.
"I got myself into the situation, I figured I might as well finish it," Ray said.
The Orioles took an 8-6 lead on Chris Gomez's RBI single in the seventh and Nick Markakis' solo homer in the eighth.
Gomez, Markakis, Melvin Mora and Kevin Millar hit homers for the Orioles. Gomez and Ramon Hernandez each had four hits, matching career highs.
Left fielder Jeff Fiorentino made a leaping catch that might've gone over the wall, preventing Matt Stairs from pulling the Tigers within a run in the eighth.
Detroit starter Wilfredo Ledezma allowed five runs and seven hits in 3 2/3 innings, his shortest of five starts this season and his second straight poor performance.
After Baltimore scored three in the fourth, the Tigers scored five in the home half -- three on Neifi Perez's double -- to go ahead 6-5.
"We fought hard. We just couldn't stop them," Leyland said. "Our pitching wasn't good and that's rare for us."
Kenny Rogers, on an extra day of rest, will start for the Tigers on Monday against Chicago.
Daniel Cabrera gave up six runs, four hits and four walks while striking out six for the Orioles.
- Baltimore RHP Rodrigo Lopez pitched two innings of perfect relief, but didn't pitch in the seventh because he felt tightness in his biceps. "We'll look at it tomorrow and make a decision," Perlozzo said.
- Tigers reliever Joel Zumaya (wrist) pitched for the first time since Sept. 9 and still had his velocity, throwing a pitch 102 mph to Mora.