Moore agreed to a one-year deal with the Cardinals on Tuesday and signed the deal Wednesday. At least four teams expressed interest in signing the Oklahoma product. The 49ers released Moore after they reached an agreement with free agent and two-time Pro Bowl linebacker Takeo Spikes.
Looking for depth and a chance to upgrade their roster, the Cardinals thought Moore was a good fit and aggressively pursued him. They convinced him to make a visit to their training camp headquarters in Flagstaff, Ariz. Once Moore arrived, he took a physical and was offered a contract.
Moore had 22 tackles and 2½ sacks last season and was cut by the 49ers earlier in the week. His best season came in 2006 when he had 92 tackles and 6½ sacks. The 29-year-old is the younger brother of former Cardinals wide receiver and current radio analyst Rob Moore.
The Cardinals released linebacker David Holloway on Wednesday to make room on the roster for the former 49er.
The signing reunites Moore with Billy Davis, the Cardinals' current linebackers coach. Davis was Moore's defensive coordinator in San Francisco in 2005 and 2006.
The 6-foot-1, 240-pound Moore had 21 starts for Davis in their two years together in San Francisco.