Some star NFL players are considering sitting out until free agent quarterback Colin Kapernick and free agent safety Eric Reid are signed to new teams.

According to Intercept’s Shaun King, those players hope to get at least 25 percent of the league to join the effort. Kaepernick started the protest movement in when he took a knee during the national anthem before a preseason game in Aug. of 2016 to help raise awareness of police brutality and racial inequality. Soon after, Reid joined his former San Francisco 49ers teammate in the protest.

Kaepernick, who voided his contract with the 49ers in March 2017 and has yet to be picked up by another team, filed a grievance against the league alleging that teams have conspired to keep him unsigned as a result of his demonstrations. This despite reported documents that are part of the lawsuit showing multiple teams saw Kaepernick as a starting-caliber quarterback when he hit free agency just before the 2017 season.

Reid filed a similar grievance in May after a free agent visit with the Cincinnati Bengals a month earlier. Reid, who in January Bleacher Report ranked as one of the league’s top 10 safeties, said Bengals owner Mike Brown asked him to commit to not protesting in the future and when he refused, the meeting ended without an offer being made.