Nall began his collegiate career at Louisiana State University, then transferred to Northwestern (La.) State for the 2001 season.
"We're trying to win next year, and we all feel like we've got a good window of opportunity to take a big stride next year, but you still have to try as best you can to build for the future," said Mark Hatley, Green Bay's vice president of operations. "We've done a lot of good things as far as staying competitive."
Kampman finished his career at Iowa with 18 quarterback sacks and 30 tackles for losses. He also had three interceptions and eight pass deflected.
Nall led Northwestern (La.) State to an 8-4 record last year and to the NCAA I-AA playoffs. The Demons then lost to Montana, 28-19, to Montana.
Nall started in the opener of the 1999 season, but was pulled at halftime because of a lackluster performance and never started again for the Tigers. He got lost in the shuffle behind Josh Booty and Rohan Davey, then transferred in early 2001, in time to join Northwestern (La.) State for the spring practice season.
"He's athletic. He has great feet He has no wasted throwing motion," said Packers offensive coordinator Tom Rossley. "He has a strong arm."