Dart out for regular season.

New York Giants quarterback Jaxson Dart will miss the rest of the 2026 regular season and undergo left-knee surgery after Monday’s 28–6 loss at the Los Angeles Rams, coach John Harbaugh said Wednesday following practice (Giants.com / Dan Salomone; ESPN / Jordan Raanan). Imaging showed damage to the meniscus, MCL and PCL with the ACL intact; recovery is expected to take about six months with Dart ready for 2027, sources told NFL Network and ESPN (ESPN; NFL Network via CBS Sports). Jameis Winston starts Sunday vs Tennessee (0–2) at MetLife; the Giants are 1–1 (Giants.com).

Dart was hurt on the opening drive at SoFi Stadium when Rams linebacker Byron Young hit him and sent him into Josaiah Stewart, who undercut his legs; he grabbed the left knee, went to the medical tent, walked to the locker room, and was ruled out (ESPN; Giants.com). He had completed three of five passes for 20 yards on the night before exiting on the seventh play from scrimmage (Giants.com). Winston finished 11 of 27 for 111 yards and an interception while being sacked twice (Giants.com; ESPN).

Harbaugh confirmed the regular-season absence after Wednesday’s practice and left open only a remote postseason return tied to recovery timing. Asked about a possible playoff window, he said he had specified the regular season and that anything beyond that “depends on the recovery” with no exact pin (Giants.com; ESPN). He did not rule out adding another quarterback — free agency, practice-squad signings and a trade were all described as open options — while naming Winston the starter and saying the game plan would shift to Winston’s skill set rather than the one built for Dart against the Rams (Giants.com). Practice-squad quarterback Jake Haener is the other healthy arm currently on the roster frame (Giants.com).

Named actors and checkable milestones locked to Giants.com, ESPN / Jordan Raanan, and the NFL Network / Schefter medical frame: Jaxson Dart (left knee; meniscus, MCL and PCL damage; ACL intact; surgery; out for the rest of the regular season; roughly six-month recovery pointed at 2027 readiness; remote postseason possibility only as Harbaugh framed it); John Harbaugh (Wednesday confirmation after practice); Jameis Winston (named starter vs Titans 0–2 Sunday at MetLife; 11/27, 111 yards, 1 INT in relief Monday); Giants 1–1 after the Rams loss; Byron Young and Josaiah Stewart on the injury play. The desk does not invent an IR designation date, a surgery calendar day beyond “relatively soon” sourcing, a guaranteed playoff return, or Sunday’s Tennessee result.

In Week 1 against Dallas, Dart completed 23 of 29 for 230 yards and three touchdowns and added 54 rushing yards — the first quarterback in NFL history to open a season with at least three passing touchdowns, 50 rushing yards and a passer rating of 130, per the club’s published note (Giants.com). Winston signed a two-year extension five days before this season and has prior Giants starts from 2025 while Dart dealt with a concussion; Harbaugh called the offensive shift more a “lane change” than a rebuild (Giants.com).

The checkable record is Harbaugh’s Wednesday confirmation that Dart misses the rest of the 2026 regular season and will have left-knee surgery, the meniscus–MCL–PCL damage with ACL intact and roughly six-month recovery pointed at 2027, Winston’s named start against 0–2 Tennessee at MetLife, the Giants’ 1–1 record after Monday’s 28–6 loss at the Rams, and Harbaugh’s refusal to pin a postseason return while leaving open a quarterback addition (Giants.com; ESPN; NFL Network / CBS Sports frame).

What comes next is checkable: any Giants or NFL Network update on Dart’s surgery date and IR paperwork; Winston’s published Week 3 status and snap count vs Tennessee; practice and injury reports on the short week; any roster move that adds another quarterback.

Floor: Dart out rest of 2026 regular season for left-knee surgery (meniscus/MCL/PCL; ACL intact; about six months, 2027 readiness); Harbaugh Wed confirm after practice, remote postseason only as recovery allows; Winston starts vs Titans 0–2 Sunday at MetLife; Giants 1–1 after Rams 28–6 Mon; Young to Stewart injury play (Giants.com; ESPN / Raanan; NFL Network / Schefter).