Yeah, it happened during a private workout session back in July ... and it's all on video.
Colin and Odell connected at UCLA for some QB, WR work -- they ran routes, Colin worked on throwing on the run and flexed his arm strength.
And, get this ... Odell showed up to the workout wearing a Colin Kaepernick #7 jersey.
Kap has been trying to showcase his skills recently in the hopes an NFL team will give him a workout. So far it hasn't happened, but he's still trying.
Just this week, Houston Texans WR DeAndre Hopkins vouched for Kaepernick during an interview with GQ magazine -- claiming the guy is clearly good enough to help an NFL team win.
Hopkins says he was upset when the Texans passed over Kap when they needed a QB in 2017 following an injury to Deshaun Watson.
The issue for Kap ... there have been plenty of QB openings over the past few weeks -- but so far, Kap has yet to get a workout invite with an NFL team.