LOS ANGELES, April 21 — Donovan Mitchell scored 30 points as the Cleveland Cavaliers roared out of the gates in the NBA playoffs on Saturday, leading wire to wire in a 97-83 victory over Orlando in game one of their Eastern Conference series.

Jarrett Allen added 16 points and 18 rebounds as the Cavs won the rebounding battle 54-40 in a victory that Allen hoped would set the tone for the best-of-seven series.