Giants quarterback Daniel Jones suffered a torn ACL in his right knee in the second quarter of Sunday's 30-6 loss at the Las Vegas Raiders, which was his first game back from a neck issue that sidelined him the past three weeks.
Giants head coach Brian Daboll confirmed the team's fears on Monday morning, telling reporters that his season was over.
Jones initially "declined to answer questions" while walking through the locker room and limping without crutches, ESPN had reported.
"Tough," Daboll said on Sunday evening. "You never want your guys to go down. He's worked really hard to get back, and it's unfortunate."
On a second-and-17 snap from the Giants' 46-yard line -- the first play of the second quarter -- during New York's third offensive possession, Jones' right knee appeared to give out before Malcolm Koonce for a 10-yard loss.
The previous play, a first-and-10 snap from the Raiders' 47-yard line, Jones' same knee seemingly buckled without contact prior to Maxx Crosby's 7-yard sack.
"He felt like he buckled and then he was running it off," Daboll said. "When I went over, we talked to him and he said, 'No, I'm good,' then went back in and obviously wasn't."
Jones walked to the medical tent under his own power. He later left for the locker room.
Undrafted rookie Tommy DeVito replaced Jones. Original backup Tyrod Taylor (ribs) is on injured reserve and recently-signed veteran Matt Barkley was not activated from the practice squad for the game.
Daboll was asked about the team's QB situation on Monday morning, and while he noted DeVito and Barkley are internal options, he said he'll have to talk to GM Joe Schoen about where the Giants go from here in terms of potentially bringing in another option to add the to QB room.
Daboll said he didn't have an answer when asked if Taylor could potentially return at some point this season.
Prior to Jones' exit, he completed four of his nine passes for 25 yards while adding nine rushing yards on two carries.
DeVito completed 15 of 20 passes for one touchdown and two interceptions while adding 17 rushing yards on four carries in the Giants' 30-6 loss. The Raiders sacked DeVito six times.
"I thought he did some good things," Daboll said. "Obviously, he had the two picks -- one was off the hands of a receiver. Yeah, the other one was kind of a cross post -- the backside corner ran with it, and they made a good play down the field. I thought he made some good decisions, stood in there, competed well, so keep working with him."
The Giants (2-7) received to open the game and registered a three-and-out. New York's second drive stalled at the Raiders' 34-yard line after nine plays for 38 yards as Jones' fourth-and-1 sneak got stuffed.
Jones entered the game with 104 of 151 passes completed for 884 yards and two touchdowns to six interceptions in five games. He rounded out his early-season production with 38 rushes for 197 yards and one touchdown.