Colin Kaepernick hasn't played a down of football since 2017, but he's not showing any signs of rust ... 'cause the quarterback looked as good as ever in a recent workout with a bunch of NFL superstars.
The 35-year-old free agent just posted highlights from his training sesh at Nike headquarters ... and the guys in attendance made it look like the Pro Bowl.
We Stay Sharp. @usnikefootball #TheOnes pic.twitter.com/Y49JEDiWF3
— Colin Kaepernick (@Kaepernick7) July 24, 2023
While players like Jaylen Waddle, CeeDee Lamb, Najee Harris and Jaxon Smith-Njigba showed up, Kap was clearly the star of the show ... putting his arm on display as he hit his targets.
"Man, he looks great," Patriots receiver Kendrick Bourne said of the workout. "He looks good, the arm looks strong. He got a rocket of an arm ... he got another good six years left."
CeeDee also had high praise for the former 49er ... adding, "The arm's still intact, strong arm. Deep balls very nice. Man, he's still Kap now. Still got it to him."
Kap -- who famously kick-started the national anthem protests in 2016 -- has made it crystal clear he's not retired just yet ... but he could very well never see the playing field again, no matter how good he can throw.