One of the biggest moments in the history of the NFL
Draft took place almost as far from it as possible. On October 12, 1989 – 171
days after Everett Ross became Mr. Irrelevant as the last pick of the 1989
Draft and 192 days before Jeff George kicked off the 1990 edition – the Dallas
Cowboys sent Herschel Walker and a handful of picks (two 3rd
rounders, a 5th and a 10th) to the Minnesota Vikings in
exchange for five players, three 1st round picks, three 2nd
round picks, a 3rd round pick and a 6th round pick.
Dallas’ multiple 1990s Super Bowl runs were powered by players such as Emmitt
Smith, Russell Maryland, Alvin Harper and Darren Woodson who either came
directly from the picks or as a result of further trades involving those picks.
Mike McCoy, who owned approximately 5% of the team, had been a business partner of majority owner Jerry Jones in the oil business. The team was looking for a way to systematically value their cache of draft picks, and McCoy was the one to do it. According to a 2004 Dallas Morning News article, McCoy spent two days graphing the actual trades that had taken place over the past four years. He found that the trades appeared to fit a trendline overlaid on the graph. This trendline became the basis for the Draft Value Chart[1].
The Chart provides a value for each pick in the form of
unitless “points” assigned decreasing from 3000 for the number one overall to,
depending on which source you consult, 0.4 points for the 256th pick
or 2 points for the 224th pick[2].
The decrease in point values is extremely steep at the top of the draft with
the value dropping by 50% to the 7th pick and by another 50% to the
24th pick, leaving it only 25% as valuable as the number one
selection for trade purposes.
Since the early 1990s the Draft Value Chart has made its
way through the NFL and become the basis for draft pick value on nearly every
team. The assistant coaches and assorted front office employees from the
Cowboys took it around the league when they left the team. Research conducted
by Cade Massey and Richard Thaler plotting actual trades found that prices
aligned closely to The Chart with the deviation from the chart dropping
significantly and trade volume increasing in the years after it became well
known[3].
In other words, once the chart became widely accepted teams did not vary from
the assigned values.