Caboclo's agent started getting calls. The information grapevine that flows between agents and teams started trickling in: maybe Oklahoma City, at 21, or Phoenix, which had another first-rounder at 27. Or San Antonio, which had the last pick of the round. If the Raptors waited until the second round, there was a very strong chance he'd be gone. And it was very hard to get additional picks this late in the process; teams have made promises to players they intend to draft if they're still on the board.
And, remember: the Suns knew about Caboclo (Barbosa). The Mavericks knew about him (Canales). The Rockets knew about him (Rosas). The Spurs knew about him (Idoka, Ginobili, Oberto). And the Raptors suspected other teams, including the Pacers and Jazz, which had two of the best international departments in the league with Pete Philo in Indiana and Rich Sheubrooks in Utah, also were on the trail. The Pacers didn't have any picks, but the Jazz had 23 in the first round, 35 in the second.