India, Oct. 13 -- The San Francisco 49ers' clash with the Seattle Seahawks on Sunday saw a heated confrontation in the second quarter that resulted in linebacker Dre Greenlaw being ejected.

However, the NFL has taken further action over the incident, handing Greenlaw a one-game suspension, reported insider Adam Schefter.

As a result, Greenlaw will be unavailable for San Francisco's Week 6 matchup against the Washington Commanders.

The league announced the suspension on Monday, stating that Greenlaw's headbutt on a helmetless opponent during the 49ers' 32-29 win over Seattle was "contrary to the generally understood principles of sportsmanship."

Greenlaw, who still had his helmet on, headbutted Seattle linebacker Ernest Jones IV during...