Stills seemed skeptical of the move when asked about it Wednesday.
He hasn't had much time to think about it since he's preparing for a road game against the 7-2 Baltimore Ravens.
But there has been plenty of time for individual teams to bring Kaepernick in for an individual workout.
Why the spectacle with possibly all 32 teams in Atlanta?
"I haven't really had much time to think about it," Stills said. "I mean, you never really know. Right now, just how it looks, how things play out. Teams could have easily brought him in for a one-on-one workout. So I don't know what's going on, if it's some type of media circus or what they're trying to do by doing this.
Kaepernick has not played in the NFL since Jan. 1, 2017. Some believe Stills was traded from Miami to Houston in the deal that brought over left tackle Laremy Tunsil largely because of his political differences with Dolphins owner Stephen Ross.
Stills continued to sit during the national anthem after arriving to Houston.