Fuentes had his contract purchased from Triple-A Reno on Monday, Nick Piecoro of The Arizona Republic reports.
The Diamondbacks will waste no time deploying Fuentes, as he is set to bat leadoff and play center field. The 26-year-old was slashing .376/.403/.481 with nine stolen bases through 34 games before being promoted. While a corresponding roster move hasn't been announced yet, it would seem likely that either A.J. Pollock (groin) or David Peralta (lower body) -- who are both out of the lineup -- will be placed on the disabled list to clear room.