NFL Media's Rand Getlin and Mike Garafolo first reported the development.
Hall is coming off a solid 2015 campaign, compiling nine passes defensed and two interceptions. Entering his 10th season, however, the corner has dealt with a litany of injuries throughout his career. He's blown his Achilles tendon twice and underwent offseason back surgery -- one reason for his late signing. He's reportedly healthy now.
Hall adds veteran depth to the Big Blue's corner group, which includes the highly paid Janoris Jenkins, veteran Dominique Rodgers-Cromartie and first-round pick Eli Apple. Hall is a slot specialist whose snaps could push Apple down the depth chart if the rookie isn't ready for full-time duty. With the addition of Hall, Apple has the luxury of learning instead of being tossed in the fire without a safety net.