Clark Cromwell Haggans (born January 10, 1977) is a former American football outside linebacker. He was drafted by the Pittsburgh Steelers in the fifth round of the 2000 NFL Draft. He played college football at Colorado State as a defensive end. Haggans played in the NFL from 2000 through 2012, for the Pittsburgh Steelers, Arizona Cardinals, and San Francisco 49ers Haggans earned a Super Bowl ring with the Steelers in Super Bowl XL against the Seattle Seahawks.