Colin Kaepernick remains an unsigned free agent, and despite some arguments to the contrary, his level of play on the field is not the sole reason.
According to Mike Florio of Pro Football Talk, internal team documents show that "teams viewed Kaepernick as being good enough not simply to be employed by an NFL team, but to be a starting quarterback for an NFL team."
This information has been unearthed as part of the quarterback's collusion grievance against the NFL, including from documents and witness testimony during depositions.
This article will be updated to provide more information on this story as it becomes available.