Dart knee threatens season.

New York Giants quarterback Jaxson Dart faces a possible season-ending left-knee surgery after Tuesday testing showed damage worse than the MCL sprain initially suspected in Monday’s 28–6 loss at the Los Angeles Rams, NFL Network and ESPN reported; evaluations remain ongoing, coach John Harbaugh said (NFL.com / Nick Shook citing NFL Network Rapoport–Garafolo + ESPN Schefter; Reuters / Field Level Media; ESPN). Wires report a possibility and ongoing evaluation, not a completed procedure or final medical decision.

Dart left on New York’s first series after a hit from Byron Young sent him into Josaiah Stewart; he walked to the locker room and was ruled out after further evaluation Monday night (NFL.com; ESPN; Giants.com). Jameis Winston finished 11/27, 111 yards, one interception and is expected to start Sunday vs Tennessee (0–2) (Reuters FLM; NFL.com). Giants are 1–1.

Harbaugh said Tuesday that evaluations were still “ongoing” and that the club would announce a direction once decisions were made with everyone involved; he declined to get “out over our skis” before that point (Giants.com; ESPN). Recovery timelines, detached-ligament labels beyond the pack’s “worse than MCL sprain” / possible season-ending surgery frame, and second-opinion outcomes wait for named team or wire confirmation. The desk prints the possibility and the ongoing evaluation — not a confirmed season end and not a confirmed surgery date.

Named actors and checkable milestones locked to NFL.com, Reuters / Field Level Media, ESPN, Giants.com and the REV 2a pack: Jaxson Dart (left knee; possible season-ending surgery after Tue testing worse than initial MCL sprain; hit Young → Stewart; out after first series; Giants 1–1); Jameis Winston (11/27, 111 yards, 1 INT; expected start vs Titans 0–2 Sunday); John Harbaugh (evaluations ongoing); Los Angeles Rams 28–6 Monday night win. The desk does not invent IR designations, practice-squad promotions, or Tennessee game outcomes ahead of Sunday.

The checkable record is Dart’s left-knee injury in the opening series of Monday’s 28–6 loss at the Rams, Tuesday testing that showed damage worse than the initially suspected MCL sprain with a reported possibility of season-ending surgery, Harbaugh’s ongoing-evaluation line, Winston’s 11-of-27, 111-yard, one-interception relief and expected start against 0–2 Tennessee, and a Giants record of 1–1 (NFL.com; Reuters FLM; ESPN; Giants.com).

What comes next is checkable: any Giants or NFL Network update confirming or ruling out surgery; Winston’s published status for Sunday vs Tennessee; practice and injury reports on the short week.

Floor: Dart left knee — Tue testing worse than MCL sprain; possible season-ending surgery (evals ongoing, Harbaugh); out after Young→Stewart hit in Rams 28–6 Mon; Winston 11/27, 111 yds, 1 INT, expected start vs Titans 0–2; Giants 1–1 (NFL.com Rapoport–Garafolo; Schefter; Reuters FLM; ESPN); wires report possibility and ongoing eval, not a completed procedure.