Many players also took a knee in protest a day after President Donald Trump said he believed players who did so during the anthem should be kicked off the field and even fired. "He's fired, '" said Trump at the rally.
"NFL attendance and ratings are WAY DOWN", he added.
We have the greatest country and the most freedom today, and we have more people, particularly black Americans, who have less hope and that's because they have very successful men telling them that they can do it but that black Americans can't do it. "League should back USA".
During the anthem as some players took a knee, Ravens coach John Harbaugh and Jaguars owner Shad Khan - who donated $1 million to the Trump campaign - linked arms and stood with other players on the sidelines.More news: President Donald Trump Holds Rally in Huntsville, Alabama
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I have seen that kind of attitude first-hand in Tennessee and across our country in the many benevolent and public-spirited efforts of our National Football League players, often without any public recognition.
Khan later issued a statement through the Jaguars' social media feed in which he called Trump's remarks "divisive and contentious".
"I am deeply disappointed by the tone of the comments made by the President ...", Kraft said in a statement.
Baltimore Ravens owner Steve Bisciotti says he "100 percent" supports his players' decision to kneel during the national anthem ahead of Sunday's game against the Jacksonville Jaguars at Wembley.
"You know, some owner is going to do that". We're football players, we're football coaches.
Kaepernick left the 49ers after last season and is still a free agent with some claiming his protests and political views have put teams off signing him.