I think that the OP was referring to his playing time while at PITT. Ricky went on to a long, illustrious NFL career with the Saints.
Again, the title of the subject was "most underrated athlete in Pittsburgh sports history", not "my favorite player who maybe did not get as much recognition as others but still was highly decorated for his career."
Jackson made some AA teams maybe as HM, was a 2nd rd pick in the NFL and eventually wound up with his bust in Canton. Not sure how that qualifies as "underrated". Great, yes. Underrated? No.