While you don't need to be an elite athlete at Off-LB to be drafted in Round 1...you do need to be above average at minimum...and your tape needs to be off the charts. Michael Pinckney is a fun player...one that I love as a Cane...but he's a below average athlete (his SPARQ scores will justify this hot take...wait for it) and only has flash plays a few times per game...he's not consistent like say...Ro Smith or Tremaine Edmunds or LVE...for all three...they had their issues playing in trash or taking on blockers, but all, when untouched, flew around the football all game, every game.
Other LBs that went on D1 or D2 are above average athletes or killed the senior bowl or provide + coverage skills. Double down on the + attribute if you are an underclassman.
Also, in sum...if you think Pinckney is a first rounder or even Round 2 or 3 pick RIGHT NOW, you just don't know what one looks like in 2018.