Athletics 4, Mariners 0: The third time facing Felix Hernandez wasn't quite charming, but Oakland managed just enough offense against Seattle's ace, and Bartolo Colon threw seven scoreless innings to lift Oakland to its third win in four games and spoil the Mariners' home opener.
Colon (2-1) has faced the Mariners in all three of his starts in 2012, and he has been dominant in two of them. He held Seattle to one run over eight innings in Tokyo, and he was even better this time, holding the Mariners to three hits - all singles.
Ryan Cook worked out of a jam to preserve the shutout in the eighth, and closer Grant Balfour worked a perfect ninth in a non-save situation.
Hernandez (1-1) didn't give up much - just two runs on seven hits over seven innings - but the A's broke through for just enough in the third. Cliff Pennington doubled off the wall in center to score one run and came around to score another on Coco Crisp's single to left.
The A's tacked on an insurance run on Kurt Suzuki's sacrifice fly in the eighth and added another on Jemile Weeks' solo home run in the ninth.
GAME NOTEBOOK: The teams played for the fifth time and in the third city this season. They split two games in Tokyo to open the season, and Seattle swept a pair in Oakland. … Seattle's Michael Saunders just missed a three-run home run when his drive to right hooked foul in the fourth. Colon came back to strike out Saunders and strand two runners. … Colon improves to 16-12 in 32 starts against the Mariners. Hernandez falls to 13-5 in 24 starts against the A's. … Weeks' home run was his second of the season. He hit only two in 97 games with the A's last season.