NFL Preview: What's the outlook on the 49ers for 2020 and beyond? - Turf Show Times
Kaepernick officially opts out of 49ers' contract to become free agent – NBC Sports Bay Area & California
Colin Kaepernick celebrates $121m NFL contract with a pool party
EXCLUSIVE: Colin Kaepernick wants out of San Francisco, prefers Jets next season: sources – New York Daily News
49ers' Colin Kaepernick signs six-year extension through 2020 season
San Francisco 49ers: Kaepernick Contract Not So Team Friendly After All
Colin Kaepernick Set To Work Out For Raiders This Week – Deadline
Richard Sherman, American Football Wiki
Colin Kaepernick agrees to settle collusion case against the NFL
Colin Kaepernick and the N.F.L. Settle Collusion Case - The New York Times