In May of 1990, the Minnesota Vikings took a chance on John Randle, an undersized defensive tackle out of Texas A&M-Kingsville whose older brother, Ervin, was a linebacker for the Tampa Bay Buccaneers. Unlike Ervin, John had gone undrafted after his college career and was just looking for a way to get his foot in the door.
Twenty years and three months later, John Randle was inducted into the Pro Football Hall of Fame, largely on the strength of 11 seasons in Minnesota during which he racked up 114 sacks. Obviously, that makes his signing by the Vikings one of the most astute post-draft roster moves of all time.