Per the final paragraph:
"When it comes to undrafted free agents it's all about making a name for yourself and that's what Hill has to do. If he wants to make the roster, he will have to beat Callahan who signed with the team last year as an undrafted free agent. It might not seem like it now, but the battle for the No. 3 QB spot might be one of the interesting position battle heading into training camp."
The Packers usually do NOT have their 3rd string QB on the 53-man roster