That's because they will have to make do without Odell Beckham Jr. for the rest of the season.
The team just couldn't hold onto a lead in the fourth quarter of their matchup against the Los Angeles Chargers this past Sunday, and once again, they let a winnable game slip through their fingers.
Watt suffered a tibial plateau fracture to end his season early for the second straight year.
His announcement comes the same day the team announced Odell Beckham Jr. will have season-ending surgery for his broken left ankle later this week. McAdoo said his focus will be on preparing him and the new but not unknown additions for Sunday's game against the Broncos in Denver.
Beckham's injury occurred in the same area where he suffered a high ankle sprain on August 21.More news: Tim Cahill Eliminates Syria From World Cup Qualification With Extra-Time Header
Replacing Beckham is an impossible task, but the Giants are left to figure out how to field an offense in time to go up against the best secondary in the National Football League in six days.
The defensive end returned this season after missing the last 13 games previous year after his second back surgery.
Denver will host NY at 6:25 p.m. MT on NBC on October 15.
It looked like the three-time Defensive Player of the Year injured his knee, but no official diagnosis has been revealed as of yet. "I didn't get into any of that", McAdoo said. Before suffering his ankle injury, Marshall had caught 18 passes for 154 yards this season. The Giants placed him and wideout Dwayne Harris on injured reserve on Monday. The team has already taken steps to rebuild their receiving core, signing Tavarres King and promoting undrafted rookie Travis Rudolph from the practice squad. Without providing a specific timetable, head coach Sean McDermott said Clay will miss "multiple weeks".