Can you add a buyer to the contract after it is signed?

[Steven Ruddell]

Can you add another buyer to a sales contract after it has been signed by the seller and the buyer?  Then after you close on the property, release yourself from the contract for a wholesale fee.

My reason for asking is trying to figure out how to close a wholesale deal when you aren't able to assign the contract, don't want to using transnational lending or a double close.