20. Mark Sanchez (2009)
Teams didn’t fall in love with Mark Sanchez because of what he did during his lone season at the University of Southern California, but moreso because of what they thought he could become.
While even then-head coach Pete Carroll didn’t think it was the best idea for Sanchez to declare after just one season of starting, he clearly got feedback that NFL teams liked the combination of physical tools, mental processing, and and smooth delivery of his throws.
There were questions as to whether the offensive scheme there made him look better than he really was, and such concerns became a bit more obvious the more time he spent in the NFL.