Second quarter. Dre Greenlaw put his helmet on and head-butted Ernest Jones IV. Jones wasn't wearing one.
That detail is the story, per the game reports from ESPN and CBS Sports. A late hit on Sam Darnold along the Seattle sideline started the confrontation, and Greenlaw, helmet still on, drove his head into the helmetless Seahawks linebacker. Officials ejected him. The 49ers played the rest of the divisional game without their weakside linebacker, and the game book shows what that cost: Fred Warner finished with 10 tackles, absorbing the middle of the field largely on his own.
Ejection is the officials' call. Suspension would be the league's, and the two are decided on different questions. The NFL reviews on-field conduct separately, weighing intent, whether a weapon was involved, and whether the other player was defenseless. A helmet functions as a weapon in that framework, and a player not wearing his is defenseless by definition. The closest precedent anyone in the league office will be thinking about is November 2019, when Myles Garrett swung Mason Rudolph's helmet and drew an indefinite suspension that ended his season. Greenlaw's act is a lesser version of the same category, not the same act. I expect a fine and at least one game, and I expect the helmetless detail to be the sentence in the discipline letter. What would make me wrong is a finding that Jones initiated contact before the head-butt.
The internet's framing, per Pro Football Network, is that Greenlaw is the "Draymond Green of the NFL" and that he must be suspended. Treat that as reaction, not reporting. The comparison gets one thing right and one thing wrong. Greenlaw's San Francisco reputation was built on a goal-line stop of Jacob Hollister in Seattle in Week 17 of 2019 that won the 49ers the NFC West. That's a disciplined, high-leverage play, the opposite of what happened Sunday. Physical linebackers who play on the edge collect reputations, and reputations are what the league office prices into a punishment.
My read on the football cost: Greenlaw off the field for a half against a divisional opponent is exactly the scenario where the 49ers' interior defense gets stressed, and Warner's tackle line is the receipt. If the suspension comes down at one game, San Francisco survives it. If the league goes longer, the 49ers are asking a defense that already leans hard on Warner to hold up without the player who sets its temperature.

