Move on.
How often have you seen your FB pass blocking and being knocked backwards by a defender that then gets a hurry or a sack? I'm assuming you are building a run blocking FB and that your team takes the FB off the field and calls passes with 3 or 5 WRs fairly regularly.
Hold Block % is probably worth looking for, it's what my FB got after his Lead Blocker piece.
If you find a Get Low piece with a good bonus like +3 strength or something similar, that could be worth buying also. Get Low, like Lead Blocker, says it provides a bonus to pushing back players when blocking, so getting it could act like adding levels of Lead Block without hitting the diminishing returns applied to taking SAs past 10. My season 2 FB had 9 Lead Block and a piece with +4 Get Low before I retired him after season 9, he was pretty decent but that's a long time ago.