American League

Athletics 4, Mariners 1

Cuban defector Yoenis Cespedes is starting to look at home with the Oakland Athletics.

Cespedes hit his first major league home run on Thursday to power the Athletics to a 4-1 victory over the Seattle Mariners that earned Oakland a split in the two-game season-opening series at the Tokyo Dome.

Cespedes, who signed a $36 million, four-year contract with Oakland on March 3, said he is starting to feel comfortable in his new surroundings.

I wake up early every day and get to the field early and work hard because the baseball is different than in Cuba, Cespedes said.

Cespedes connected for a two-run homer off Seattle reliever Shawn Kelley (0-1) to give Oakland a 2-1 lead in the bottom of the seventh. Josh Reddick followed with a solo shot off George Sherrill to give the As a two-run cushion.

They tried to throw me sliders every at-bat, so I had to adjust to hit the ball, Cespedes said. It was great to hit a home run here for the Japanese fans.

The As opted not to re-sign Japanese slugger Hideki Matsui after a disappointing 2011 season and are hoping Cespedes can provide more production in the middle of the order.

The late rally Thursday was an encouraging sign for Oakland, which had only scored one run in the first 17 innings of the season.

Oakland manager Bob Melvin said Cespedes has been showing steady improvement since joining the team at the beginning of this month.

Hes getting more and more comfortable every day, Melvin said. The challenges he faces on the field are probably the easiest for him. Hes been dropped into a situation that is difficult both on and off the field.

Oakland starter Bartolo Colon picked up the win after striking out six and holding the Mariners to one run on three hits over eight innings. Grant Balfour pitched a scoreless ninth for the save.

I mixed my pitches well, Colon said. I tried to go inside with my two-seamer and outside with my fastball.