Hasty didn't practice Thursday due to an ankle injury.
In his five appearances this season, Hasty hasn't been more than a change-of-pace option out of the 49ers backfield, averaging 3.7 yards on his 13 carries, gathering in 13 of 18 targets for 91 yards and scoring one TD on the ground. Now with a health concern in tow, he could be in danger of losing the backup gig behind Elijah Mitchell to Jeff Wilson, who was activated from the PUP list Saturday. Wilson was active but didn't see any action this past Sunday against the Cardinals, which could change if Hasty's injury lingers. In any case, Hasty will have two more sessions to put himself into a position to be available Monday versus the Rams.