Is Danny Jacobs officially filling in for James Kirkland against Michael Walker?

They were talking about it on FNF, but there doesn't seem to have been anything on it since. He got rid of his guy without being hit in two rounds so Jacobs isn't going to be too damaged to fight or anything. The undercard really, really needs it. Two four round mismatches and a Soto mismatch is a crap undercard. A Jacobs/Walker mismatch isn't exactly going to make it good but at least Jacobs is a fighter worth showcasing and they can market it as a step up, plus add in the two fights in eight days drama. What else could they do? They can't put Alvarado on tv against a lightweight with almost ten losses. Golden Boy doesn't want to show Mares on his first fight back from injury. The Matthew Hatton fight ends up being the most showable fight on the card for the slot somehow if they don't go through with Jacobs/Walker.