49ers’ Dre Greenlaw suspended after headbutt leaves opponent bleeding
Ernest Jones IV was not wearing helmet during incident

TL;DR
- Dre Greenlaw suspended for one game after headbutting Ernest Jones IV.
- The incident followed a late hit on Seahawks quarterback Sam Darnold.
- Greenlaw was ejected from the game.
- The NFL cited the action as contrary to sportsmanship.
- Greenlaw has a history of ejections and suspensions.