League rules state NBA players, coaches and trainers must "stand and line up in a dignified posture along the sidelines or on the foul line" during the national anthem.

The rules don't say anything about the national anthem singer.

On Monday night, Leah Tysse took a knee as she performed the last lines of the anthem at the Sacramento Kings preseason opener at the Golden 1 Center.

The Berkeley resident's move did not go unnoticed online.

Tysse taking a knee comes after several weeks of professional athletes protesting the national anthem in various ways, including taking a knee.

The trend started with 49ers quarterback Colin Kaepernick during an August preseason game.