Amid dwindling numbers at outside linebacker, the 49ers have signed Kenny Rowe (6-3, 235), who spent training camp with them last year. Rowe, a defensive end at Oregon, joined the 49ers as an undrafted free agent following the end of the lockout. The team entered Friday's game with two outside linebackers in street clothes - fifth-round pick Darius Fleming and seventh-rounder Cam Johnson. They also lost starter Aldon Smith to a badly bruised hip during the Vikings second offensive series. It's not know when Smith will return, but the injury is not believed to be serious. Source: Sacramento Bee