The National Football Post is doing a series of articles, by divisions, to identify the "sleeper" pick on each team. Their definition is the third day draft choice having the biggest impact, so we are looking at rounds 4-7. They have not yet gotten to the NFC North, but I suspect it is their next article since they have done AFC East, NFC East and now AFC North.
So, who will the Packers "sleeper" be? Martinez seems to be the logical choice, since he is a decently ranked player playing the position and having the skills corresponding to a significant team need.
Keep in mind they aren't looking at impact this year, but looking back at the draft years later.
Any support for Lowry, Davis or Murphy looking at it 5 years from now?