Two players took a knee and one raised his fist during the national anthem.
Twitter users were quick to point out the lack of diversity in the religious affiliations of Super Bowl-winning quarterbacks.
'Sports Illustrated' released an excerpt on Tuesday.
The league plans to donate $89 million to social justice causes, but Eric Reid has called it a "charade."
The former Bears player and coach has faced criticism over his comments.
The former San Francisco 49ers player dismissed the report on social media.
The majority of people do not back up the president's calls for players to be fired for taking a knee
The peaceful protests have prompted widespread discussion over the past few weeks.