A day after a rally in support of him outside the NFL's offices in New York, Colin Kaepernick thanked the participants in a tweet on Thursday.
On Wednesday more than 1,000 people crowded the area around the league's midtown Manhattan offices. Many of those fans wore jerseys with his name and demanded Kaepernick be signed by the start of the regular season on Sept. 7.
On Twitter, Kaepernick wrote: "Thank you to everyone who went to support yesterday. My faith always has been and always will be in the power of the people!
Last season with the San Francisco 49ers, Kaepernick refused to stand for the national anthem as a way to protest police brutality against African-Americans.
During the protest, many demonstrators chanted: "Boycott! Boycott!"
Before the protest, the NAACP called for a meeting with the NFL to discuss Kaepernick. Interim president Derrick Johnson sent a letter to NFL commissioner Roger Goodell that it's apparently "no sheer coincidence" that Kaepernick is not on a team.
Goodell has stated the league isn't keeping teams from signing Kaepernick because of his protests.
The 29-year-old Kaepernick had shoulder surgery prior to the 2016 season and began the regular season behind Blaine Gabbert in San Francisco. In March, he opted out of his contract with the 49ers and became a free agent.