Along with five NBA teams, Duffy said many European clubs were interested in signing Clark, but that the Jazz's offer created the best situation for the shooting guard.
"The opportunity, in my assessment, was this was the best for him," Duffy said.
The Jazz were interested in Clark as far back as draft night, Duffy said, when they acquired point guard Trey Burke, center Rudy Gobert and Brazilian point guard Raul Neto.
Clark appeared in three NCAA Tournaments with Belmont and averaged 18.2 points as a senior. Duffy said he had interest from five other NBA teams, which, according to a USA Today report, included Portland, Golden State, Boston and Miami. He played with the Heat at the Orlando Pro Summer League.
Clark would join Alec Burks and Brandon Rush, acquired from Golden State earlier in July, as shooting guards on the Jazz roster.