The Cards today agreed to terms with 6th round draft choice Chis Harrington on a three-year deal.  He started 12 games at defensive end for Texas A&M last season, making 58 tackles, two sacks, two forced fumbles and he even blocked a kick.  He is the fourth draft pick to be signed by the team, as they have already inked defensive end Kenny Iwebema, Richmond running back Tim Hightower and Northern Iowa tackle Brandon Keith.