The Giants have placed running back Shane Vereen and backup quarterback Ryan Nassib on injured reserve.
The Giants announced the moves Tuesday, a day after disclosing that Vereen had reinjured the triceps muscle that put him on injured reserve after the third week of the season. Nassib has had a recurring elbow injury this season.
With Nassib sidelined, Josh Johnson becomes Manning’s backup. Johnson has appeared in 29 games with five starts but hasn’t played in a regular-season game since Dec. 22, 2013, for Cincinnati against Minnesota. He last threw a regular-season pass on Dec. 11, 2011, for Tampa Bay at Jacksonville.