"Colin Kaepernick offers to join Jets' practice squad."
"Kaepernick seeks practice squad role, not starting QB position."
"Kaepernick's letter shows dedication to getting Jets' defense ready."
"Aaron Rodgers' injury prompts Kaepernick's offer."
"Kaepernick's NFL journey, from Super Bowl to activism."
"Jets yet to respond publicly to Kaepernick's offer."