I didn't think too much of Horn. In 2012 we had Franklin and Mauk. Here is the 2012 roster:
https://mutigers.com/sports/football/roster/2012
Berkstresser did ok in limited action filling in for an injured Franklin in 12. He was 3rd string behind Franklin and Mauk in 2013. The list of QBs under Drink is not impressive. I'd rate Berkstresser over Pyne.