Vic Fangio knows him well
The Broncos traded for Joe Flacco this past offseason, and even though it was brief and they had no direct connection in meeting rooms, Vic Fangio noted his time with Flacco in Baltimore as an assistant coach as a piece to the puzzle of eventually acquiring him.
If there’s anyone in the NFL today who knows Colin Kaepernick, it’s Vic Fangio. The two were in San Francisco together from 2011-2014 when Kaepernick was the starting QB and Fangio was the defensive coordinator.
Heck, they even went to the Super Bowl together.
One way or another, their connection in San Francisco would help the Broncos make a more educated decision of whether or not to flirt with the idea of signing Kaepernick. Fangio knows what he’s capable of, and he probably knows him as a person as well as any coach in the league.