Shurmur also said he hopes to have all of his key players—Manning included—back for next year.
Earlier this month, Shurmur told reporters he thought Manning had enough left in the tank to be a starting quarterback for multiple seasons going forward.
The 37-year-old is under contract for 2019 before he's eligible for free agency. The Giants could cut bait this offseason if they wanted to go in a different direction at quarterback. According to Over the Cap, they'd save $17 million while absorbing a $6.2 million salary-cap hit by either trading or waiving Manning.
Following Sunday's game, Manning finished 2018 with 4,299 passing yards, 21 touchdowns and 11 interceptions. He entered Week 17 ranked 23rd among qualified quarterbacks in DYAR (defense-adjusted yards above replacement), per Football Outsiders.
Strong arguments could be made for both retaining and releasing Manning.
Since he only has one year left, the Giants can keep him on the roster while positioning his replacement—likely an early-round selection in the 2019 draft—to take over in 2020. The Kansas City Chiefs used a similar strategy with Alex Smith and Patrick Mahomes.
New York may prefer to get the transition started right away, and the early success of Baker Mayfield and Lamar Jackson illustrates how rookie QBs can thrive in a starting role.
The fact both Shurmur and Beckham have spoken positively about Manning would seemingly signal his return is likely. But the final decision ultimately rests in general manager Dave Gettleman's hands.