Plenty of underclassmen won’t be drafted at all

With a record 73 underclassmen certified to enter the 2013 draft, an obvious question arises:  How many will be drafted? Here’s an obvious answer:  Not all of them. The 2012 Official NFL Record & Fact Book has the full chart of eligible underclassmen who were drafted, dating back to 1990.  In recent years, the number…