Kansas City, MO (Sports Network) - Jose Guillen went 2-for-4 with three RBI and a run scored as the Kansas City Royals swept the doubleheader and three- game series against the Oakland Athletics with a 9-6 win.

Alberto Callaspo drove in two runs while Mike Aviles went 3-for-4 with an RBI and two runs scored for the Royals, who have won four of their last five games. Kyle Davies (6-6) gave up just one run on three hits with three walks and two strikeouts in five innings of work.

Ryan Sweeney went 3-for-4 with two runs scored and three RBI while Dan Meyer (0-4) gave up eight runs -- seven earned -- on nine hits in 3 1/3 innings of work for the Athletics, who have dropped five of their last six games.

In the earlier game, Joey Gathright's RBI single in the 10th inning led Kansas City to a 5-4 victory over Oakland. The game was a makeup of Wednesday's game, which was rained out due to the remnants of Hurricane Gustav passing through the area.

The Royals scored all the runs they needed in the first inning. With men on first and second, Guillen punched an RBI single to left and Billy Butler followed with a run-scoring double. Callaspo then hit a ball that Jack Cust was unable to field and Guillen crossed the plate. John Buck then hit a sacrifice fly to score Butler for a 4-0 lead.

Oakland got a run in the third as Rajai Davis hit a two-out single and Sweeney followed with a double to bring home Davis to make it a 4-1 game.

Kansas City got the run back in the third on an RBI single from Callaspo.

In the fourth, the Royals added three more runs. With David DeJesus on second, Esteban German ripped a triple to center and Aviles followed with a triple of his own. Guillen later singled to left to make it an 8-1 game.

German scored in the sixth as Guillen reached base on a error from Eric Patterson.

Oakland got three runs back in the seventh on a two-run double from Sweeney and a sacrifice fly by Daric Barton to make it a 9-4 game.

The Athletics didn't go quietly and scored twice in the ninth on an RBI double from Cust and a run-scoring groundout from Barton to make it a 9-6 game. Ramon Ramirez, though, struck out Jack Hannahan and Patterson to end the game and pick up his first save of the season.