As of late Thursday afternoon, 11 teams were scheduled to be in attendance, according to the NFL, which is coordinating the event. Those teams were the Cardinals, Falcons, Browns, Broncos, Lions, Dolphins, Patriots, Giants, Jets, Buccaneers and Redskins. Other teams are expected to attend, the league said.
Kaepernick's workout is part of his attempt to play again in the NFL. He hasn't been on a roster since the 2016 season, during which he kneeled during the national anthem in protest of police brutality and racial injustice.
"It’ll be interesting," Bears coach Matt Nagy said Wednesday when asked of Kaepernick's workout. "He’s been out of the game a little bit. But when he was doing well and playing, he definitely was a weapon. I’ll be curious to see how he does.
"I wish him the best and all that and you always root good for people but from where I’m at right now personally we’re so focused in on the Rams."
When asked about whether the Bears will be in attendance, Nagy deferred to Bears general manager Ryan Pace, who wasn't made available for comment. Pace hasn't addressed reporters since prior to the regular season.
Kaepernick has been viewed by some as a controversial figure since his protests during the national anthem began. During that 2016 season, he completed 59.2 percent of his passes for 2,241 yards, 16 touchdowns and four interceptions in 12 games for the 49ers.
Kaepernick hasn't played since that season. His protests are widely viewed as the reason why he isn't on an NFL roster.
"There’s always going to be backlash when you fight for different ideologies and different beliefs and different rights," Kaepernick told reporters in Chicago late in 2016. "That has been proven throughout history. For me, it’s not something I’m concerned with. I knew that backlash was going to come when I initially took this stance, and I know it will continue to come."
Kaeperick's workout comes during a time in which the Bears' quarterback position has come into question. Mitchell Trubisky, the No. 2 overall pick in 2017, has struggled in his third NFL season and come under scrutiny with the Bears at 4-5. His 85.2 quarterback rating ranks 25th in the NFL, and his 35.8 QBR is ranked 31st among 32 qualifying players.
While Kaepernick hasn't played in the NFL in the last three seasons, he did help the 49ers reach the Super Bowl in 2012.
Bears cornerback Prince Amukamara, the team's alternate union representative, expressed support for Kaepernick's attempt at an NFL comeback.
"He definitely deserves to be in the league," Amukamara said. "He's a starter in this league.
"It would probably bring a lot of people together. I do feel like there's some hostility and stuff like that. I feel like that would bring some type of closure.
"I don't think that criticism is going to come from inside the locker room. Even though the reason he's kneeling is not about the flag. But there's a lot of dudes that are passionate about the flag. I think that's what's so great about football. Guys put their differences aside and play for one common goal."
The Bears have stood by Trubisky despite his struggles. The team's belief in its starter could be part of why Pace and his brass haven't committed to sending scouts to see Kaepernick's workout.
"Even if they did, I wouldn't look at it as a shot at Mitch," Amukamara said. "I feel like all teams do what's best for them and always do their due diligence. I think I saw the Patriots are sending someone there. It's all about doing your due diligence and not leaving stones unturned."
The NFL will supply all 32 teams with video of Kaepernick's workout and interview.