NFL review could mean another suspension for 49ers linebacker Dre Greenlaw

San Francisco’s defense could be without one of its most recognizable linebackers again after the NFL began reviewing the conduct that led to Dre Greenlaw’s ejection in Sunday’s game. According to Yahoo Sports, the league will look at the incident further for possible additional discipline, a process that could extend into the next contest on San Francisco’s calendar.

The immediate impact was already clear. The 5-0 49ers had to play without Greenlaw for more than two quarters after he was ejected, forcing a midgame adjustment in the way the defense could match personnel and coverages. In the NFL, losing a starting linebacker for that stretch typically changes both front-seven rotations and secondary alignments, because linebackers often dictate checks and responsibilities.

That disruption sets up what comes next. Yahoo Sports reports that Greenlaw could be missing next Monday night when the 49ers face the Commanders, and that the absence could last the entire four quarters if the league’s review results in further action. The timing matters for the 49ers because Monday night games compress preparation, limiting how much the staff can rework the game plan around an unavailable defender.

Greenlaw’s role on the 49ers has been significant because of how often he figures into the team’s defensive communication and run-defense structure. When a player with that responsibility is sidelined, teams often have to reshuffle assignments before the snap, not just swap one name on the depth chart. Even if San Francisco responds well on the field, there can be a learning curve for who carries certain duties when a key piece is removed for the full duration.

The NFL’s discipline review does not always produce a longer suspension, and it does not always produce a suspension at all. Without an official decision in hand, it is not possible to say how the league will classify the incident or whether any additional penalty will be issued. For now, the only confirmed point is that the conduct that resulted in an ejection is under further consideration, creating uncertainty for the next matchup.

For San Francisco, the most important question in the near term is how the defense functions without Greenlaw if he is indeed sidelined for the entire Monday night game. The coaching staff will likely emphasize contingency packages that keep the front aligned, preserve gap integrity in run defense, and maintain coverage rules that reduce the need for last-second corrections.

If Greenlaw is unavailable, the Commanders game becomes a stress test for San Francisco’s depth and scheming. It also affects how the 49ers manage linebacker reps throughout the contest, since the defense may need to lean more heavily on the players expected to start in his absence while keeping others fresh for later downs. If the league later announces additional discipline, the timeline could also influence how the 49ers plan for subsequent weeks. Until the NFL issues a ruling, the storyline for San Francisco remains a waiting game over Greenlaw’s availability.