Marlowe recorded 11 tackles (10 solo) in Sunday's 31-17 loss to the Chiefs.
The Chargers elevated Marlowe from the practice squad Saturday, Daniel Popper of The Athletic reports.
Marlowe has been ruled out for the remainder of Sunday's divisional-round matchup against Cincinnati due to a groin injury.
Marlowe will start Sunday's game against the Patriots, Joe Buscaglia of The Athletic reports.
Atlanta traded Marlowe to Buffalo on Tuesday in exchange for a 2023 seventh-round pick.
Marlowe is expected to start at strong safety in the absence of Jaylinn Hawkins (concussion) during Sunday's matchup against Carolina, Michael Rothstein of ESPN.com reports.
The Falcons re-signed Marlowe on Thursday, Michael Rothstein of ESPN.com reports.
The Falcons released Marlowe on Wednesday, Michael Rothstein of ESPN.com reports.
The Falcons have signed Marlowe to a one-year contract, Matt Urben of the USA Today reports.
Marlowe recorded seven solo tackles during Sunday's 29-27 win over the Vikings.