The Sounders sent allocation money and a third-round SuperDraft pick to Columbus for the center back, a two-time MLS Defender of the Year.
The Sounders on Thursday acquired veteran center back Chad Marshall from the Columbus Crew for allocation money and a 2015 third-round SuperDraft pick. Marshall, the 2008 and 2009 MLS Defender of the Year, played under Sounders coach Sigi Schmid in Columbus from 2006 to 2008, winning the MLS Cup in '08.
"Chad is a quality defender who brings experience to the Sounders," Schmid said in a press release. "I look forward to working with Chad again and await his positive contribution to our team."
Marshall, 29, had spent his entire 10-year MLS career with Columbus, appearing in 253 regular season matches. The Riverside, Calif., native has 11 caps with the U.S. national team and made the 30-man preliminary roster for the 2010 World Cup squad.
He figures to bolster a Seattle defense that faltered down the stretch this past year, allowing 13 goals in the final five regular season games after conceding just 29 in the 29 matches prior. The center back duo of Djimi Traore and Jhon Kennedy Hurtado then particularly struggled in a 5-3 aggregate defeat to Portland in the two-leg Western Conference semifinal.
The club had already began retooling its defense before Thursday, declining the options on goalkeeper Michael Gspurning and left back Marc Burch and acquiring goalkeeper Stefan Frei from Toronto FC.