OAKLAND, Calif. (AP) _ Olmedo Saenz's RBI single in the 11th inning gave the Oakland Athletics a 3-2 victory over Baltimore on Sunday night, snapping the Orioles' six-game winning streak and again highlighting their bullpen problems.

Ben Grieve opened the 11th with a liner into the right-center gap that center fielder Brady Anderson, who had just entered the game, misplayed into a triple. The ball bounced in front of Anderson, who overran the ball and then fell trying to retrieve it.

After two intentional walks, pinch-hitter Saenz slammed a pitch from Tim Worrell (2-2) over the center-field fence on one bounce. The winning pitcher was Jason Isringhausen (1-0), who entered in the top of the 11th and got Albert Belle to ground into an inning-ending double play with runners on first and third.

Oakland tied it in the ninth when Ramon Hernandez led off with a homer off Mike Trombley, who had just entered the game. It was the fifth blown save of the season by Orioles' relievers.

The ninth-inning collapse by the Baltimore bullpen allowed the A's to avoid being swept in the series and spoiled a solid performance by starter Jason Johnson, who was reclaiming his spot in the Orioles' rotation.

Johnson, who pitched so poorly in spring training he was relegated to the minors, allowed one run on four hits in six innings. Recalled from the minors Friday and making his first major league appearance of the season, Johnson struck out three and walked three.

Johnson escaped two jams, retiring Eric Chavez on a ball to the wall in right with two on in the fourth and getting a shoestring catch by left-fielder B.J. Surhoff with runners on second and third in the fifth. Replays showed Surhoff might have trapped the ball, hit by Matt Stairs.

Surhoff and Cal Ripken had RBI singles in the fourth for the Orioles. Jason Giambi had a sacrifice fly in the fifth for the A's.

The hit was No. 3,007 for Ripken, tying him with Al Kaline for 22nd place on the career list. It was his 1,584th RBI, tying him with Rogers Hornsby and Harmon Killebrew for 26th place. His Orioles teammate, Harold Baines, is 25th with 1,588 RBIs.

Mark Mulder, making his second major league start, allowed two runs on four hits in seven innings for the Athletics. He walked two and struck out four.

The A's broke a three-game losing streak, and snapped a five-game home losing streak. Oakland was within three outs of its sixth consecutive loss at home, which would have been its worst such streak in one season since dropping eight straight in May 1994.

Notes: Ripken has an eight-game hitting streak. ... Johnson went 0-3 with a 6.95 ERA in six spring training games. He was 1-0 with a 0.90 ERA for Triple-A Rochester. ... The A's are 4-8 at home this season. ... With his sacrifice fly, Giambi tied Baltimore's Mike Bordick for the AL lead with 24 RBIs. ... Grieve's triple was his first since May 15, 1998, at Detroit.