If you remember, Dellavedova was a restricted free agent last off-season. He was asking for a then thought of ridiculous 3.2 million to resign in Cleveland. He garnered no other interest in the NBA and ended up signing his qualifying offer worth approximately 1.2 million.
At the end of this season, Dellavedova will again be a restricted free-agent. This works again in the Cavaliers favor as it allows the rest of the league to set his value by signing an offer sheet that the Cavs could match if they deem it reasonable.