Will Atlanta add a QB?

During his NFL career, Atlanta Falcons franchise QB Matt Ryan has been quite durable. In the five seasons since he was drafted No. 3 overall, he's played in 78 out of a possible 80 regular season games, and was even able to come back fairly quickly after having his ankle stepped on awkwardly by OT Will Svitek. One can look at this one of two ways: there's no need to worry, as Ryan can shrug off the typical wear and tear that an NFL QB endures, or he's due for a significant injury one of these days. Can Atlanta depend upon their current backups to take his place?