(Sports Network) - The Oakland Athletics will try to bounce back and win their four-game series with the Seattle Mariners this afternoon when they play the finale of the set at McAfee Coliseum.

After winning the first two games, Oakland found itself on the wrong end on Wednesday, as Jose Lopez drove in three runs with a bases-loaded double, helping the Mariners pull out a 6-4 win.

Lopez finished with two hits and two runs scored while Adrian Beltre had three hits and two RBI for Seattle, which snapped a three-game slide.

Mariners starter Miguel Batista, who was already starting in place of an injured Erik Bedard, was forced from the mound with a groin strain after coming out to start the third. Roy Corcoran (1-0) tossed 2 2/3 scoreless frames, becoming the benefactor of the M's big fifth inning, and earning his first major-league victory in the process.

Donnie Murphy smacked a three-run double and Jack Cust hit a solo homer for Oakland, which saw a two-game winning streak halted.

A's starter Joe Blanton (5-12) was charged with six runs on nine hits in six innings to take the loss. Blanton matched a team record for losses before the All-Star break with his latest performance.

Oakland is five games back of the AL West-leading Los Angeles Angels of Anaheim, who will visit the A's for a three-game series right before the break.

Seattle will hand the ball to righty R.A. Dickey, who is 2-4 with a 4.36 ERA. Dickey did not get a decision on Saturday against the Detroit Tigers, as he surrendered two runs and four hits in six innings of a 3-2 win.

Dickey is 0-4 lifetime against the A's with a 9.00 ERA in seven games, five of which have been starts.

Heading to the hill for Oakland today will be rookie Greg Smith, who is 5-7 with a 3.62 ERA. Smith lost for the second time in his last three starts on Saturday in Chicago, as the White Sox reached him for four runs and five hits in five innings.

Smith has never faced the Mariners.

Seattle has won three of its five contests in Oakland this season and is 11-3 at McAfee Coliseum since the start of last season.