Breida was released by the 49ers on Monday, Jeremy Fowler of ESPN.com reports.
Breida caught his only target for three yards in Monday's Week 16 loss to Philadelphia. He did not log any rush attempts.
Breida (hamstring) doesn't have an injury designation for Monday's game against the Eagles, Adam Caplan of SiriusXM NFL Radio reports.
Breida (hamstring) was considered a limited participant on the Giants' estimated injury report Friday, Dan Salomone of the team's official site reports.
Breida (hamstring) was a limited participant in practice Thursday, Dan Salomone of the Giants' official site reports.
Breida rushed three times for minus-one yard and did not catch his only target in Sunday's 31-19 win over Washington.
Breida rushed once for three yards and didn't receiving any passing targets in Sunday's Week 10 loss to Dallas.
Breida rushed four times for 13 yards and didn't catch his only target in Sunday's loss to Buffalo.
Breida is expected to start Thursday's game in San Francisco with top running back Saquon Barkley (ankle) ruled out for the Week 3 matchup, Dan Salomone of the Giants' official site reports.
Breida carried the ball four times for 28 yards and caught seven of eight targets for 12 yards in Sunday's 22-16 loss to the Eagles.