After a rumor that the Atlanta Falcons had signed Boise St. Broncos DL Ryan Winterswyk to play tight end, the Idaho Statesman's Broncos beat writer confirmed the scuttlebutt. He's got the physique for the position, and has apparently cross-trained enough that it wasn't clear to many which position he'd eventually play.
He reportedly worked out as a tight end for the Miami Dolphins and other teams, though most also wanted to see his defensive line talents. The Falcons have room for depth at both positions, so I do hope they'll try him out all over the place.
At this point, most teams have been attached to more than one undrafted free agent signing. While it's a fool's errand to try and keep up with all the UFA news right now, there are plenty of fools out there grinding, God bless them. You'll have to assume the Falcons are operating in silence compared to teams like the Broncos, Panthers and Jaguars, who are all over the radar.