There is a growing sense that the Chicago Bulls will have to attach an asset in order to trade Zach LaVine, according to K.C. Johnson of NBC Sports Chicago. 

The Bulls have been reluctant to do so, and also are not interested in moving LaVine for expiring contracts.

Johnson adds that the Pistons, who have been linked with a move for LaVine, are still undecided about a potential deal. 

LaVine will earn $138 million over the next three seasons.