"We've had a long time to look at B.J., he's worked hard and done all that," General Manager Ted Thompson told the Milwaukee Journal-Sentinel. "We wanted to put the spotlight on Jon Ryan and see how he responds. I like what I've seen in terms of leg strength. We just need to see more of him. We don't have a clear enough picture."
The Packers drafted Sander in 2004 in the third round but his performance in Green Bay has been disappointing and uneven.
Sander played collegiate football for Ohio State, although he only started in his senior year. Ryan came from the Canadian Football League.
Notable deaths of 2014 [PHOTOS]