The Dallas Cowboys signed offensive tackle Jason Fabini to a three-year contract Saturday, a potentially key addition overshadowed by the signing of receiver Terrell Owens. The 6-foot-7, 304-pound Fabini likely will take over the right tackle spot that's been troublesome pretty much since Erik Williams was in his Pro Bowl prime in the 1990s. Rookie Rob Petitti played there last season and struggled, especially when extra blockers were used to help other linemen.