foxsports
The Sounders made the announcements on Friday. Boss had previously posted on Twitter his intention to retire due to complications from concussions.
Boss spent three seasons in Seattle backing up starter Kasey Keller, but was key in Seattle's dominant U.S. Open Cup run and in the CONCACAF Champions League. Boss suffered a series of concussions this season. He previously played two seasons with New York in the MLS.
Graham signed with Seattle in 2009 after spending three season playing for the Sounders USL franchise. Graham played in one MLS game and nine other matches across other competitions in his time with Seattle.
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