Luis Castillo had his best outing of the season and rookie Ben Williamson drove in the game's only run as the Mariners eked out a 1-0 victory over the Pirates.

Pitching was the key for the Seattle Mariners in a 1-0 victory against the Pittsburgh Pirates on Saturday at T-Mobile Park. Living up to his nickname,

Ben Williamson had an RBI double in the sixth inning, Luis Castillo tossed seven innings, and the Seattle Mariners beat the Pittsburgh Pirates 1-0 on Saturday night. Williamson, who came in with just one RBI since May 29,