I think 2-3 is about the norm. I am pretty sure that the peak under Solich was in 2005. It seems like 8-11 of them played in 2005.
I went back and looked, and this is what I found:
2005=10: Stuck, Jones, White, Peterson, Parson, Mitchell, Meyers, Hartke, Kenkle, Leuck
2006=5: Garrett, Price, Jackson, Hodge, Luchsinger
2007=4: Davidson, Brazill, Keller, Meyers,
2008=2: Carrie, Weaver
2009=5: Davis, Allen, Tettleton, Fortune, Woseley
2010=1: Smith
2011=4: Wells, Fisher, Crutcher, Davis
2012=2: Patterson, Scipio
2013=7: Wood, Mangen, Smith, Stewart, Basham, Sayles, Williams
2014=9: Lowery, Pruehs, McCray, OUellette, Walker, Brunis, Brunson, Nelson, White
2015=3: Provitt, Croutch, Hale
2016=1: Popp
2017=5: Meservy, Kittrell, Ross, Hudson, Brooks
So, the average is about 4.5, not far from where we are.