Three Seahawks remained in the tunnel during the national anthem prior to Seattle's preseason game against the Indianapolis Colts.
The newspaper noted that Dolphins defensive end Robert Quinn raised his fist while standing during the anthem, renewing a protest he did during the 2017 National Football League season.
During pregame warmups, multiple Eagles players wore T-shirts raising awareness about voter registration and prison populations.
Jenkins was joined on the sideline by cornerback De'Vante Bausby, who also raised a fist.
It was a show of solidarity with the ongoing protests against police brutality and racial injustice, launched by former NFL quarterback Colin Kaepernick in 2016 and banned by NFL Commissioner Roger Goodell in May.
A dozen games were played Thursday night.
After a quiet Hall of Fame game last week in which there were no protests, there were several demonstrations in the first full week of preseason games on Thursday, including kneel-downs and fists in the air. Teammate Chris Long reportedly "placed his arm around Jenkins' shoulder" during the song.
Several Jacksonville Jaguars players were not on the field for the playing of the anthem before their preseason game against the New Orleans Saints, according to The Florida Times Union. The growing popularity of the peaceful protest particularly angered President Donald Trump, who said the act was unpatriotic and called for participating players to be fired.