San Francisco 49ers star Dre Greenlaw has been punished by the NFL for his shocking headbutt on his opponent during Sunday's game. Greenlaw was ejected from the 49ers showdown against the Seattle Seahawks after he delivered a headbutt to the unprotected head of Ernest Jones IV on the sidelines during the second quarter of the Week 5 win for San Francisco. The Niners will now be without their No. 2 linebacker once again with Greenlaw hit with a one-game suspension for the 'unsportsmanlike conduct.' The ban, which was announced by the league on Monday afternoon, will see Greenlaw miss the 49ers' Monday Night Football matchup against the Washington Commanders next week. He will be eligible to return to the 49ers' active roster on Tuesday, October 20 - the day following the Week 6 game. Greenlaw is set to reportedly appeal the suspension, according to NFL insider Ian Rapoport. Under the Collective Bargaining Agreement, Greenlaw may appeal the suspension. His appeal would be heard by the hearing officers jointly appointed and compensated by the NFL and NFLPA to decide appeals of on-field player discipline. Greenlaw was tossed during the second quarter after he sparked a heated confrontation on the Seattle sideline and shockingly headbutted an opponent. Greenlaw was initially called for a personal foul for a late hit on Seahawks quarterback Sam Darnold with 6:23 left in the second quarter. However, he did not stop there. The Niners player continued to spark tensions as he found himself surrounded by Seahawks players following his pursuit of their quarterback. He then became embroiled in a heated exchange with Seahawks middle linebacker Jones. But the verbal clash then turned physical when Greenlaw, still wearing his helmet, headbutted a helmetless Jones. Jones appeared to briefly grab Greenlaw's facemask causing the Niners linebacker to retaliate with his headbutt to Seahawks star's unprotected skull. Greenlaw was then ejected for the incident, leaving San Francisco without the linebacker for the remainder of the game. #dregreenlaw #49ers #sanfrancisco49ers #seattleseahawks #nfl - @dailymailsportusa