For a long, long time, the Green Bay Packers have been a franchise that has received significant contributions from undrafted players. Ted Thompson preached the value of undrafted players, finding many starters (including several on the 2010 Super Bowl-winning defense) after the draft. This year, Brian Gutekunst tried his hand at that phase of player acquisition, and it appears that there are at least a handful of players who will compete for roster spots.
Linebacker Greer Martini has had a few nice plays in practice and made a couple of tackles in the preseason opener.