BALTIMORE - Adam Jones was not happy. That 0-for-18 slump was bothering him. So was the talk that he was hurting.

After a ninth-inning single broke that slump, Jones decided he had worked enough for the day, and launched a two-run home run in the 12th inning to give the Baltimore Orioles a 6-4 win over the Philadelphia Phillies before 46,611 at Oriole Park on Saturday.

Jones drove a pitch from rookie B.J. Rosenberg into the Orioles bullpen, and spoiled his major league debut.

"Oh my gosh! Getting a little frustrated there," Jones said. "I'm frustrated that I'm not hitting the ball like I am normally, but hey, it's a humbling thing to get in a slump."

Chris Davis led off the 12th with a walk off Rosenberg (0-1) and then Jones hit the fastball out.

"I like Adam in that situation," Orioles manager Buck Showalter said. "I like putting the game in his hands."

Showalter considered having Jones bunt, but thought better of it.

"[Showalter] hits me fourth for a reason," Jones said.

Luis Ayala (2-1), the Orioles' sixth pitcher, pitched a scoreless 12th for the win.

It was the Orioles' (33-26), eighth consecutive extra-innings win.

"I think we like to play a lot longer than the nine innings. We enjoy that. We enjoy the overtime," Jones joked. "If we don't win it in nine, hopefully we can win it in 12, 15 or 17."

Tommy Hunter started the game, just as he had for the Orioles 15-inning win at Kansas City and 17-inning win at Boston last month. Jones had game-winning home runs in those games, too.

Fresh from 10 days at Norfolk, Hunter allowed three runs and eight hits in seven innings. The three runs came on home runs by Jimmy Rollins, Jim Thome and Hector Luna.

Philadelphia (29-32) was held to two hits in the last four innings by Jim Johnson, Darren O'Day and Ayala.

Hunter was in line for his first win since Apr. 24, but Pedro Strop couldn't hold a 4-3 lead in the eighth.

"That's what they call a quality start, so we'll live with that," Hunter said.

When Hunter was recalled, the Orioles sent rookie pitcher Miguel Gonzalez to Norfolk. It was a bit of a surprise because Jake Arrieta looked to be a sure thing to go.

Arrieta pitched abysmally on Friday night, allowing nine runs and 11 hits.

Instead of sending his Opening Day starter down, Showalter sent him to the bullpen instead.

Showalter feels that Arrieta needs to clear his head.

"We're in the mode here where we're trying to give you the best chance to win. Jake as a starter isn't it right now, but we hope he will be again," Showalter said.

He strongly considered sending him to Norfolk to start.

"I don't have much doubt that Jake would go down there and do well statistically in Triple-A. You can be confident of being a good pitcher in Norfolk and still have that doubt of whether you're going to be a good pitcher at Camden Yards," Showalter said.

Arrieta was relieved by the decision. He's never pitched in the bullpen professionally, but has embraced the role. Arrieta spoke with Jason Hammel, who was sent to the pen by Colorado last season, and it helped him.

"Going to the bullpen is going to do a lot of things for me," Arrieta said. "It's going to allow me to get a lot of the thoughts and emotions out of my head."

The Orioles need a fifth starter next Saturday. Maybe it will be Arrieta. Maybe not.

"I could have gotten sent down, but they feel I bring a lot to this team,"Arrieta said. "It kind of eases my mind to know they feel that way about me. I want to be a starter, and in the long run, I'm going to be a starter."

QUICK HITS: The Orioles turned a season-high four double plays. ... The crowd was the second largest of the season and was the second sellout. ... Hunter has given up 16 home runs this year.

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