Giants coach Joe Judge said this past Monday that Fromm was "in consideration" to start against Philadelphia instead of Glennon, who has struggled as the starter during New York's current three-game losing streak.
"Obviously, there is a big difference between starting an entire NFL game and coming in at the end of the game when a team is playing more of a two-minute/prevent mode," Judge said. "That is not a knock on Jake. That is just the reality and truth."
The Giants will get back one of their offensive weapons Sunday as rookie wide receiver Kadarius Toney is active for Sunday's game. Toney has missed the team's past four games with an oblique/quad injury and a stint on the reserve/COVID-19 list.
Fromm, 23, was drafted by the Bills in the fifth round last year but did not appear in a game in 2020. He will try to spark a Giants attack that ranks 27th in total offense and 30th in scoring.
Glennon, 32, completed just 51% of his passes for 477 yards, two touchdowns and five interceptions over the past three games, which the Giants have lost by a combined total of 78-36.