Atlanta signed Mack to a reserve/future contract Wednesdsay, Terrin Waack of the Falcons' official site reports.
Mack (hamstring) had a workout with the 49ers on Monday, Field Yates of ESPN reports.
Mack (hamstring) reached an injury settlement with the 49ers on Thursday, Aaron Wilson of ProFootballNetwork.com reports.
Mack (hamstring) was reverted to IR after clearing waivers Tuesday, per the NFL's official transaction log.
Mack (hamstring) was waived/injured by the 49ers on Monday.
Mack (hamstring) will be out a few weeks, Jennifer Lee Chan of NBC Sports Bay Area reports.
Mack exited Saturday's preseason game against the Vikings due to a hamstring injury, Cam Inman of The San Jose Mercury News reports.
Mack was waived by San Francisco on Friday, Matt Maiocco of NBC reports.
Mack signed a reserve/future deal with the 49ers on Monday, Aaron Wilson of ProFootballNetwork.com reports.