Hall (coach's decision) is listed as inactive for Sunday's game against the Eagles.
Hall's absence comes as a bit of a surprise given his usage as the slot corner throughout the season, along with his veteran experience. The Giants' defensive scheme in Week 9 figures to deploy Janoris Jenkins and Eli Apple on the outside with Dominique Rodgers-Cromartie covering the slot, Pat Leonard of the New York Daily News reports.
Hall suffered a concussion during Saturday's preseason contest against the Jets, Art Stapleton of The Record reports.
The Giants inked Hall to a contract in early August to bolster their depth at cornerback, but he's worked as a free safety in recent practices due to injuries befalling each player at the position. With his diagnosis known, there's no telling when Hall may be able to return to the field.
During 7-on-7 periods, Hall received extensive work at free safety alongside strong safety Landon Collins in the base and nickel defenses, the Newark Star-Ledger reports.
With Darian Thompson (shoulder) sidelined for at least a week, the Giants need to find a free safety, and the veteran cornerback could be the solution. If Hall were to wind up starting, he'd have some IDP upside.
Hall (back) signed with the Giants on Thursday, Dan Salomone of Giants.com reports.
Hall spent the entirety of his nine-year career thus far in Cincinnati, where he racked up 470 tackles, 26 interceptions, 112 passes defensed, and five forced fumbles. The 31-year-old underwent back surgery earlier this offseason that may hamper his availability throughout training camp, but he's set to provide a veteran presence in the Giants' secondary while Eli Apple, Janoris Jenkins, and Dominique Rodgers-Cromartie lead the cornerback corps.