With only a few quarterbacks off the board, grabbing an athletic quarterback who can make plays with his feet and his arm to be Jake Locker's long term backup makes sense.
For those of you who remember when Rusty Smith had his very short time as a starter a couple of seasons ago, he was awful. He threw multiple interceptions against what was, at the time, the worst pass defense in the league (Houston).
While backup quarterbacks are not a priority, when you have a mobile quarterback like Locker, he's likely to get injured every now and then, and so you need a capable backup. Why not back up Jake Locker with a poor man's Jake Locker? That's exactly what Austin Davis is.
He had a great season, leading Southern Miss to their best season in recent memory. He also threw for 30 touchdowns, nearly 3500 yards, and only 11 interceptions. He also ran for 352 yards.
If nothing else, he's an upgrade over Rusty Smith and will be able to run the same offense Locker will.