Rajai Davis' grand slam was the only Oakland hit in an eight-run eighth inning, and the Athletics topped the six-run barrier for the first time in 41 games, beating the Baltimore Orioles 11-2 Friday night.

The victory ended Oakland's four-game skid and extended Baltimore's season-high losing streak to seven games.

The A's led 3-2 before pulling away in the eighth. After three Baltimore pitchers combined to issue six walks and hit a batter, the fourth pitcher of the inning, Randor Bierd, yielded Davis' first career grand slam.

Davis had entered earlier in the eighth as a pinch runner for Jack Cust.

The big inning enabled Oakland to avoid tying a franchise record for consecutive games without scoring more than six runs. The Philadelphia Athletics went 41 straight games without scoring more than a half-dozen runs from Sept. 23, 1915 to May 20, 1916, and the 1916 A's matched the mark from June 29-Aug. 8.

Hours before the game, the Orioles announced that manager Dave Trembley would return in 2009. The timing was curious, given that Baltimore had dropped 11 of 12 to sink deeper into the AL East cellar, but club president Andy MacPhail called it a "demonstration of support."

In August 2007, after MacPhail promoted Trembley from interim manager, Baltimore lost 30-3 to Texas. This time, the Orioles issued 10 walks and yielded double figures in runs for the fifth time during their seven-game slide.

Oakland's Jack Hannahan was mired in a 3-for-27 slump before getting a fifth-inning single. In the bottom half, the third baseman made an outstanding backhand catch of a foul pop, then flipped over the rail into the A's dugout.

Then, in the sixth, Hannahan drew a walk from Orioles newcomer Brian Bass to put Oakland ahead 3-2. Hannahan also received a bases-loaded walk from Brian Burres during the wacky eighth.

Oakland starter Dallas Braden (5-3) allowed four hits and two runs, one earned, in five innings.

The A's got three walks and two singles in the sixth but scored only one run. After center fielder Adam Jones threw out Emil Brown trying to score on a single, Orioles starter Chris Waters (2-2) issued a walk to load the bases and was pulled.

Trembley summoned Bass, obtained earlier in the day in a trade with the Minnesota Twins. In discussing the move, MacPhail said, "The attractive thing about Brian is that he throws strikes."

Bass promptly issued a four-pitch walk to Hannahan to force in a run. Two innings later, Bass walked a batter and hit one to get Oakland started on its eight-run outburst.

Notes:@ The latter part of the game was played in the rain. ... The Orioles played without hitting coach Terry Crowley, who served a one-game suspension for coming onto the field to argue a play in Wednesday's game at Boston. Baltimore was also without DH Aubrey Huff, whose wife gave birth to a boy on Thursday. ... Braden recorded Oakland's major-league leading 32nd pickoff.

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