The PFP series was created by Sean Lahman in 2002, and with his team of writers he produced the first three editions.
He created the annual Pro Football Prospectus in 2002 and produced the first three editions in the series.
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Pro Football Prospectus (written by Football Outsiders) has their own system (dubbed "KUBIAK" after longtime Broncos backup quarterback Gary Kubiak) for projecting future performance.