The 49ers retained Hasty on their initial practice squad, Matt Maiocco of NBC Sports Bay Area reports.
Hasty impressed the 49ers during training camp with his quickness and soft hands, but a crowded veteran backfield led to the undrafted rookie to be cut and eventually moved to the practice squad. San Francisco's current backs aren't the models of good health, so Hasty could find himself called upon (or poached by another club) at some point this season.