Las Vegas police officers have been accused by Michael Bennett of pointing guns at him and using excessive force during an incident following the Floyd Mayweather-Conor McGregor fight.

Bennett said officers pointed guns at him "for doing nothing more than simply being a black man in the wrong place at the wrong time" and ordered him to lie down on the ground.

Bennett wrote that one officer, with his gun drawn, warned him that he would "blow my f------ head off" if he moved. Another officer jammed his knee into Bennett's back and handcuffed him, according to Bennett.

Bennett was placed in a police car until they confirmed his identity.

"They apparently realized I was not a thug, common criminal or ordinary black man but Michael Bennett a famous professional football player," Bennett wrote.

Bennett has been a vocal advocate for former 49ers quarterback Colin Kaepernick, the first NFL player to publicly protest during the anthem last season.

Kaepernick, who remains unsigned this season, tweeted his support of Bennett on Wednesday.

"This violation that happened against my Brother Michael Bennett is disgusting and unjust," Kaepernick tweeted. "I stand with Michael and I stand with the people."

The Seattle Seahawks have acquired Sheldon Richardson from the New York Jets for Jermaine Kearse and draft considerations.

Richardson was the NFL Defensive Rookie of the Year in 2013 and a Pro Bowler in 2014.