Colin Kaepernick Says He's 'Still Ready' for an NFL Comeback .
Kaepernick has not played in the NFL since 2016.
The former NFL quarterback posted a video to Twitter and Instagram on Wednesday.
Showing himself working out at a gym.
5 days a week.
For 3 years.
Still Ready, Colin Kaepernick, via Twitter .
Twitter account @KapWatch has kept track of Kaepernick's free agency, which is currently at 889 days.
Kaepernick opted out of his contract with the San Francisco 49ers in March 2017.
Kaepernick gained notoriety in 2016 for kneeling during the national anthem .
To protest racial injustice and police brutality in the United States.
His grievance against the NFL was settled in February, where he argued collusion among NFL teams from signing him.