SCOTTSDALE, Arizona (Ticker) -- Miguel Tejada keyed a six-run eighth inning with a three-run homer as a split squad of Oakland Athletics rallied for a 10-9 victory over the San Francisco Giants.

Tejada hit his fourth spring homer, Bo Porter had an RBI single and Dionys Cesar a two-run triple in the eighth. Jason Giambi, who scored three times, cracked a two-run homer in the first and Eric Chavez a solo shot in the sixth for the Athletics.

Jeff Tam was the winner after pitching a scoreless seventh in relief of Mark Mulder, who gave up six runs and eight hits in six innings. Bert Snow picked up the save with a scoreless ninth.

Barry Bonds hit his eighth homer of the spring, a two-run blast off Mulder in the fifth. Doug Mirabelli stroked a two-run homer in the sixth off Oakland's prized young lefthander.

Ben Weber took the loss, allowing five runs, three hits and two walks while recording just one out. Joe Nathan pitched seven innings, giving up four runs and seven hits.