While looking around in my CFM, I noticed a few running backs get Backfield Master (Travis Etinnene, Josh Jacobs and a few others.) I have had several people tell me any runningback can get it. I noodled around with some attributes and could never get it to unlock or be an option. I also removed it from one player and it was no longer available. So apparently it is a natural baked on ability. Someone also suggested that you players had to be a specific archetype, but that doesn't work out because several of the RBs with it all have different archetypes.
Is there anyway to get it or is it exclusive to just a few backs? I am really surprised Jamyr Gibbs did not have it.