Andrew Wiggins has filed papers with the NBPA to terminate his relationship with BDA Sports.
Bill Duffy said he had recently been made aware of rival agencies and potential start-up enterprises who were recruiting Wiggins with inducements that included no commission fees on contracts.
Duffy had negotiated Wiggins' five-year, $148 million contract extension with the Minnesota Timberwolves. The NBPA has guidelines that compensate previous agents for deals negotiated under their watch.
"We are disappointed that Andrew made this decision, especially after a three-year partnership where we worked closely with Andrew and his entire family," Duffy told ESPN. "Unfortunately, tampering is a common problem in our industry, and that's part of the reason why I've already been in contact with the NBPA to discuss my rights in this matter. Obviously, whenever Andrew signs the max extension that we negotiated with Minnesota, we will work with the NBPA to make sure that our interests are protected."