It was a great day to be a Raiders fan Friday. Besides the hated Broncos having to cut defensive end Elvis Dumervil because of a late fax of a contract agreement, Oakland replaced disappointing Rolando McClain with the signing of free agent middle linebacker Nick Roach. A six-year veteran, Roach has started 59 career games, spending the majority of his career as Chicago's starting strong-side linebacker. But he moved to the middle in place of injured Brian Urlacher last season and obviously caught Oakland general manager Reggie McKenzie's eye. The terms of Roach's contract with the Raiders were not disclosed, but a league source said the Raiders offered $3 million to $4 million a year for three or four seasons. He is the second linebacker signed by Oakland this week, following a three-year, $6 million deal given to former Browns linebacker Kaluka Maiava on Wednesday. "It's just exciting," Roach said in a conference call, "the whole culture of the organization, that in my mind is on the upswing, and being able to come in and add to that, hopefully, is something to look forward to."