Rosen is signing with the Falcons, according to NFL Network's Mike Garafolo. The team has since announced the signing of Rosen.
The news comes a day after it was announced Atlanta backup AJ McCarron was lost for the season with a knee injury. The Falcons officially placed McCarron on injured reserve upon the Rosen announcement.
Rosen previously cleared waivers, but the Falcons have a need and he'll look to fill it. Prior to signing Rosen, the Falcons also worked out another former first-round QB, Blake Bortles, NFL Network Insider Ian Rapoport reported Tuesday, per the league transaction wire.
Rosen is now bound for his fifth NFL franchise after he was drafted 10th overall by the Arizona Cardinals in 2018. The Cardinals traded him to the Dolphins after just one season and after one season with Miami, he made his way to the Buccaneers and 49ers, but never played a regular-season down.