You Explicitly listed both types of RBs last and next to last out of 11 positions in what you called “ranked in value”. You’re back peddling here.
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You are correct--I listed them the lowest for draft value. And I will stand by that. Value. Not importance.
If the team were a machine, I see running backs as consumable wear-parts. They're bushings, tires, a shear pin. Yes, your machine needs those parts--they are no less important than the power center, the transmission, and everything else, because your machine will not run without all of the parts. At least not for long and not very well.
And sadly, that's running backs in the current NFL. When they hit their magic carry number, (what is it, 10,000 on the career) they are largely done. They get hurt a lot. It's a brutal position. And you grab another from the parts bin, shove it in, and get back to work.
Part of running backs being able to be replaced easily isn't just the talent level. It's how they fit into the machine. I never played running back, but I more or less know how to take a handoff. Now consider someone who's done it for 10 or so years. Pass blocking is mostly want-to and coaching.
I struggle to see how someone is going to the same value from a Rd.1 running back vs. a Rd.1 pass rusher or cornerback (of course giving both picks the benefit of the doubt that they are very good, highly graded prospects, etc etc.)
Just looking at our own team, it's hard to say we got appropriate value from Eddie Lacey as a Rd.2 pick.
A. the top 5 RBs in 2018 scored 87 TDs
B. the top 5 WRs in 2018 scored 65 TDs
An interesting way to look at it, but the top
2 quarterbacks threw more TDs (89) than the top 5 running backs ran in. Yes, running backs certainly caught some of those, but that kind of highlights my point. Passing is more valuable in the modern game.
And finally...
Part of the draft is getting the rare player. 6'6" 230 pound giants that can jump over a house and run a 4.5 or faster are rare. Plenty of guys around 5'10" 215 pounds that can take punishment between the tackles.