The Oklahoma City Thunder have re-signed restricted free agent Robert Swift, a 7-foot-1 center who has been plagued by knee injuries. Terms of the deal were not disclosed. A lottery pick four years ago out of high school, Swift was a McDonald's All-American at Bakersfield High School. Swift, though, has averaged only 1.8 points and 2.3 rebounds in 71 games in four seasons with the Sonics organization, now renamed the Thunder. Swift, the 12th pick in the 2004 draft, is still young. Age 22, Swift averaged 1.8 points and 2.3 rebounds in only seven games last season after missing the entire 2006-07 season with a torn ACL. In high school, Swift averaged 18.8 points, 15.9 rebounds and 6.2 blocked shots a game his senior year. He appeared in a career-high 47 games three years ago with Seattle. Swift started 20 games that season but has been limited to eight games the past two seasons due to injuries.