Matt Waldman shares his pre-draft report from this 2017 Rookie Scouting Portfolio where he assesses Rams wide receiver Cooper Kupp as an underrated player.   Cooper Kupp, Eastern Washington (6-2, 204) Underrated Section of the 2017 RSP Cooper Kupp, Eastern Washington: Kupp’s draftnik valuation has ridden a baby roller coaster this year. Thanks to a 4.62-second…