Seth Smith accounted for the lone run with a solo homer and Tommy Milone pitched seven strong innings as the visiting A's clipped Erasmo Ramirez and the Seattle Mariners 1-0 on Monday night.
Ramirez (0-2) struck out 10 and allowed only three hits in the best start of his career, but made one mistake, leaving a first-pitch fastball up in the second inning to Smith. The A's slugger blasted it to straightaway center for his eighth homer of the season.
Milone (8-5) made that run stand up, scattering seven hits and not walking a batter while striking out five to win his second straight start.
Grant Balfour worked a perfect eighth and Ryan Cook worked around a two-out walk in the ninth to lock down his fifth save.
Ramirez was making just his third career start after being recalled and placed in the rotation on June 14. The 22-year-old threw 72 of his 103 pitches for strikes and faced only two batters over the minimum in eight innings.
The Mariners got a runner to third base in the third inning, but Milone induced a groundout to end the threat. Seattle put a runner in scoring position in the fourth inning as well, but Milone induced a double play to escape the jam.
NOTES: Ramirez's previous career high in strikeouts was five, accomplished in four innings at Arizona last week. ... Oakland center fielder Yoenis Cespedes (hamstring) could return to the outfield today after spending the last week at designated hitter.