Kansas City, Mo. ? Adam Jones homered with one out in the 15th inning, lifting the Baltimore Orioles to a 4-3 victory over the Kansas City Royals on Wednesday night.

Jones was hitless in six at-bats before connecting for his team-leading 12th home run — nine of them tying the game or giving the Orioles a lead. Jones sent a 2-2 pitch from Nate Adcock (0-1), the fifth Kansas City pitcher, far over the left-field wall.

The Orioles improved to 5-0 in extra-inning road games.

Kevin Gregg (1-1) pitched two hitless innings, walking one, to pick up the victory. Jim Johnson earned his 13th save.

Royals right-hander Felipe Paulino, who was making only his third start after beginning the season on the disabled list with a right forearm strain, held the Orioles to five hits in seven scoreless innings. He struck out nine and walked two.

The Royals’ bullpen had a 1.04 ERA in the past seven games, but relievers Jonathan Broxton and Kelvin Herrera gave up three runs on six hits in the eighth and ninth innings.

Broxton was trusted with a 3-1 lead in the ninth, but blew his second seven in 10 opportunities and his first since April 11 at Oakland. Broxton gave up a solo homer to Wilson Betemit with one out and three singles to produce the tying run. J.J. Hardy’s two-out hit scored pinch-runner Ryan Flaherty to make it 3-3.

Humberto Quintero’s two-out single in the fifth scored Jeff Francoeur, who led off the inning with a double, and Alcides Escobar, who was hit by a pitch. It was Quintero’s first multi-RBI game with the Royals.