The Seattle Seahawks announced the hires of three assistant coaches on Wednesday.

Dwaine Board will be the assistant defensive line coach, Chris Cash will coach cornerbacks and Andre Curtis will coach safeties.

Board spent 2003-08 as the defensive line coach under Mike Holmgren. The Seahawks ranked second in the NFL with 136 sacks from 2005 to 2007 and led the NFL with 50 sacks in 2005, when they played in Super Bowl XL.

Board earned four Super Bowl rings with the San Francisco 49ers — three as a player (1981, 1984, 1988) and one as defensive line coach (1994). He is one of 20 people in NFL history to win a Super Bowl as both a player and coach.

Board coached with the 49ers from 1990 to 2002 and, after Seattle, joined the Oakland Raiders (2009-10) and Cleveland Browns (2011-12). He spent the last two years at St. Francis High in Mountain View, Calif.

Cash played in the same USC secondary as Kris Richard under Pete Carroll in 2000-01. Both defensive backs were drafted in 2002, and Richard had been Seattle’s secondary coach until being promoted this offseason to defensive coordinator to replace Dan Quinn, who was hired as the Atlanta Falcons’ coach.

After a five-year NFL career marred by injuries, Cash got into coaching in 2007. He spent five seasons as a high school defensive coordinator before coaching safeties at Florida A&M the past two years.

Curtis most recently was assistant secondary coach for the New Orleans Saints. He also was a defensive quality control coach for the New York Giants (2006-08) and safeties coach for the St. Louis Rams (2009-11).