NEW YORK (AP) — Baker Mayfield, Saquon Barkley and Sam Darnold. The top three picks in the most recent NFL draft are all expected to make a major impact in 2018, assuming of course Mayfield (Cleveland) and Darnold (Jets) earn the starting jobs. But often it's the unheralded rookies that can make a real difference. Recent examples are the Cowboys' Dak Prescott (fourth-rounder in 2016) and the Saints' Alvin Kamara (third-rounder in 2017).Read more on NewsOK.com