Tim Tebow Ripped Topless QB Workout ... At USC

Tim Tebow is still jacked ... and TMZ Sports has photos of the teamless wannabe QB showing off his divine physique Wednesday during a shirtless workout at USC.

As we previously reported, Tebow has become a regular on the Trojan campus -- often running drills with high profile QB coaches.

Even though he's not currently signed to a pro squad -- and recently took a job as an analyst for ESPN -- it appears Tebow is refusing to give up on his NFL dream. 

Gotta respect the hustle ... and the biceps.