One streak has to end on Thursday in the A's and Giants home-and-home Interleague series finale at AT&T Park.
The Giants have a 6-0 record when Barry Zito takes the mound at home this season, but he will face an A's team that has won six straight games and 11 of its last 12, including three wins in three days in this Bay Bridge Series.
With wins on Monday and Tuesday in Oakland and another in San Francisco on Wednesday, the A's matched their season high of eight games over .500 and pulled within two games of the first-place Rangers in the American League West. Oakland has gained 5 1/2 games in the standings in 12 days.
Meanwhile, San Francisco's three straight losses dropped them 2 1/2 games back of the D-backs in the National League West.
Oakland will go for its third sweep in the last four series with A.J. Griffin opposing Zito.
Griffin had thrown four straight quality starts before running into the less-than-potent Astros his last time out.
Despite Griffin earning the win, the Astros snapped his streak with four earned runs on five hits in 5 2/3 innings. Griffin did strike out seven while walking one. He is 5-3 with a 3.84 ERA and has thrown 63 1/3 innings in 10 starts this season.
Athletics: Reddick hopes to return Friday
If things go well for Josh Reddick in his rehab game at Triple-A Sacramento on Thursday, he will be reinstated from the disabled list on Friday according to A's manager Bob Melvin.
Reddick was placed on the DL May 7 with a sprained right wrist, an injury stemming back to the first week of April.
When Reddick returns, he will try to improve on a .152 batting average, which was third-lowest in the AL when he went on the shelf.
Giants: Zito hopes to end May strong
Zito has struggled in his last three starts, allowing five runs at Toronto and Colorado and four at home against the Rockies.
The left-hander gave up 30 hits in the three games while watching his ERA rise from 2.75 to 4.13.
Zito is 3-3 with a 4.13 ERA and has thrown 56 2/3 innings in 10 starts this season.
• The Athletics have a 23-12 record in night games, compared to an 8-11 mark during the day. Their night record is third-best in the AL, and their day record is second-worst.
• The A's are 50-45 against the Giants in Interleague Play, but have lost 10 of the last 13 in San Francisco.
Kevin Massoth is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.