Colin Kaepernick reached out to the New York Jets in the wake of Aaron Rogers' Achilles injury, but the team wasn't interested.

On Tuesday, musician J. Cole posted a letter written by Kaepernick addressed to Jets general manager Joe Douglas on social media. In the letter, Kaepernick requests not to take over Wilson's post, but to be signed to the practice squad. 

The letter is dated 10 days after Rodgers suffered his injury in the season opener. Kaepernick says his training schedule has remained the same for six years, and that he is not done with football. 

Kaepernick's last snap in the NFL came on Jan. 1, 2017.