Alvarado went undrafted in the 2021 NBA Draft but signed a two-way contract with the New Orleans Pelicans, which allowed him to split time between the Pelicans and their G League affiliate, the Birmingham Squadron. His performance with the Pelicans quickly earned him a standard NBA contract. Known for his defensive prowess, energy, and hustle, Alvarado became a fan favorite and an integral part of the team’s rotation.