Spanky, to the best of my knowledge Fran McCaffery hasn't signed a contract to this day. Kirk Ferentz worked at Iowa for a long period without a signed contract. It's not at all uncommon for coaches to start work before the contract has been signed. An oral contract can be binding if the parties have agreed on all the material terms. In the case of an assistant coach (unlike head coaches) there usually isn't a lot of negotiation of collateral terms, and signing the contract may well have been a mere formality.
I was happy to hear Jordan got a job but I think what he did to WMU was sleazy. I think Belein and the WMU coach acted a little sleazy as well.
I'd like to hear LaVal's next speech to a recruit about the importance of honoring a commitment.