Phillips Valdez is headed out west after being designated for assignment by the Boston Red Sox earlier this week.
The right-handed reliever was claimed off waivers by the Seattle Mariners on Friday, the team announced. He was subsequently optioned to Triple-A Tacoma.
Valdez, 30, amassed a 4.41 ERA in 16 1/3 innings pitched out of the Red Sox bullpen this season. In three seasons (65 appearances) with Boston, he posted a 4.67 ERA and 1.41 WHIP. He notched a 3.06 ERA (17.2 IP) with 19 strikeouts in 14 games with Triple-A Worcester.