Kaepernick kneels during national anthem in San Diego as police violence protest continues
San Francisco 49ers quarterback Colin Kaepernick (7) walks through the tunnel out onto the field before the game against the San Diego Chargers before the game at Qualcomm Stadium on Sept. 1, 2016. (Orlando Ramirez/USA TODAY Sports via Reuters)

San Francisco 49ers quarterback Colin Kaepernick knelt with his arms folded during the performance of the U.S. national anthem during a pre-season game in San Diego on Thursday, continuing his protest against racial injustice and police brutality.

Kaepernick, 28, has pledged to continue sitting during the performance of "The Star Spangled Banner" before National Football League games, a move that has been both criticized and cheered by commentators.

(Reporting by Rory Carroll; Editing by Paul Tait)