The Oakland Athletics don't need quite that level of heroics from their slugger in a three-game series this weekend.Matsui returns to Philadelphia for the first time since the 2009 World Series when the A's make their first visit to Citizens Bank Park on Friday night.Matsui went 8 for 13 with three homers and eight RBIs, leading the Yankees to the World Series title in six games over the Phillies (47-29). He dominated Philadelphia pitching despite starting just three home games as a designated hitter and appearing as a pinch-hitter on the road.The two-time All-Star capped the Series by going 3 for 4 with one homer, while his six RBIs matched a World Series record set by Bobby Richardson in 1960.Matsui, who has 499 combined homers between Japan and the United States, is expected to start in left field for Oakland (34-42) after sitting out Thursday's 4-1 road loss to the New York Mets. He got his first two starts in left during the previous two games and showed he's still capable defensively by catching nine fly balls.However, his offense hasn't been nearly as good. He's hitting .221 with six homers and 30 RBIs this season, going 1 for 8 with four walks and four strikeouts his last three games.While Matsui and the A's are in danger of following a season-high six-game winning streak with a third straight loss, the Phillies seek an eighth consecutive home victory.Philadelphia leads the majors with 28 home wins, and has outscored opponents 43-15 during the seven-game run at Citizens Bank Park.The Phillies, though, were pounded 12-2 at St. Louis on Thursday after back tightness forced Roy Oswalt's exit following two innings.Philadelphia's rotation leads the majors with a 3.11 ERA, and Vance Worley (2-1, 3.41 ERA) is trying to prove he can be a consistent contributor.The right-hander is getting another turn in the rotation after yielding one run in five innings before leaving without a decision in Saturday's 5-1 win at Seattle. He was recalled from Triple-A Leigh Valley two days prior after going 2-1 with a 3.75 ERA in six games -- four starts -- during his previous stint in the majors this year."Now that I know I'm starting, I guess it's a little bit more relieving to know that I'll be here still," Worley told the team's official website.Worley is 2-0 with a 2.12 ERA in three home starts.The Phillies have dropped five of nine all-time meetings with the A's, but haven't hosted them since winning two of three at Veterans Stadium from June 6-8, 2003.The A's have lost 17 of their last 21 on the road and were outscored 7-3 in losing their last two to the Mets.Oakland sends Guillermo Moscoso (2-3, 3.30) to the mound hoping the right-hander can earn his first win in over a month. Moscoso is 0-3 with a 3.32 ERA in five games -- three starts -- since beating Baltimore on May 19.He didn't get any support from his offense Saturday against San Francisco, getting pulled with two outs in the fifth after his throwing error led to two unearned runs in a 4-2 win.