But, he never really panned out at QB -- bouncing around a few teams including the NY Jets, New England Patriots and finally had a short stint with the Philadelphia Eagles in 2015 ... the last time he was in the league.
After that, Tebow went all-in on a baseball career and spent years with the NY Mets organization playing for their minor league teams.
He retired from baseball back in February after it became clear he wasn't gonna make the big leagues and decided to focus on learning the tight end position.
Tebow had a workout with the Jaguars sometime over the past month ... and it seems he did enough to impress the Jags coaches, who will see if he can be an asset.
Don't scoff ... NFL tight end Marcedes Lewis told us he thinks Tebow has a real shot at success at the position because he's smart, athletic and knows the game as well as anyone.