Two recent reports have the Green Bay Packers looking at two defensive backs. These guys are waaaaaay off the radar, and I'd be surprised if the Packers would draft either one with even a 7th round pick. But they're candidates to be signed as undrafted free agents, who might have gotten workouts because there isn't enough game film to evaluate them. Or it could mean that they are serious about adding some depth in the secondary.
National Football Post reports on that the Packers attended the pro day at South Dakota State to watch CB Cole Brodie. I can imagine that there might not be much game filmed when South Dakota State takes the field. They may have wanted to take a better look at him.
Also from NFP, they attended a private workout for Baylor CB Antareis Bryan. In his case, the game film isn't recent enough since he's missed almost the entire last two years due to injury.