The NFL suspended Dre Greenlaw for one game.

He plays for the San Francisco 49ers.

The league said he head-butted Ernest Jones IV.

Jones plays for Seattle.

Greenlaw did this without a helmet.

This happened in Sunday's game.

The NFL said the act was bad for sportsmanship.

Greenlaw will miss the next game.

It is next Monday night against Washington.

He can still play if he wins an appeal.

The incident happened in the second quarter.

The 49ers beat the Seahawks 32-29.

Sam Darnold ran and went out of bounds.

Greenlaw hit him late.

That was a personal foul.

Some Seahawks players then came at Greenlaw.

He head-butted Jones.

Jones was bleeding after the hit.

Greenlaw was thrown out of the game.

Coach Kyle Shanahan spoke after the game.

He said players get "baited big time" on the other team's bench.

He said someone told him Greenlaw butted a player without a helmet.

Shanahan said the team must be smarter.

He said they cannot do that.

Greenlaw has a history of bad acts.

He was thrown out two times before.

In 2023 he fought with Philadelphia's head of security.

In 2022 he hit Justin Herbert helmet-to-helmet.

Last season he was suspended one game.

He was with Denver then.

He yelled at an official.

Last week he was fined $11,941.

He taunted the Broncos' bench.

Greenlaw came back to San Francisco this season.

He has 37 tackles in five games.