According to the Washington Post's Rick Maese, Kaepernick's legal representative are "expected to meet" with Goodell as part of the collusion grievance against the league's owners.
The grievance, which was filed in October, alleges the league and its owners "have colluded to deprive Mr. Kaepernick of employment rights in retaliation for Mr. Kaepernick's leadership and advocacy for equality and social justice and his bringing awareness to peculiar institutions still undermining racial equality in the United States."
As for Carroll, ESPN's Adam Schefter reported Thursday that the Seahawks wanted to bring Kaepernick in for a workout this week but nixed those plans when they found out he would continue his protest against social injustice and racial inequality during the national anthem this season.
Seattle instead signed free-agent quarterback Stephen Morris on Friday. Morris, 25, hasn't thrown a pass in the NFL since going undrafted out of the University of Miami.
According to Maese, Seahawks general manager John Schneider is also expected to be deposed alongside Carroll.