Blak Bortles said his delivery is "more efficient, quicker" after working on his mechanics with 3DQB's Adam Dedeaux in California.
Owner Shad Khan said the Jaguars are "counting on" a bounce-back year from Blake Bortles.
Coach Doug Marrone confirmed Blake Bortles' starting job is not in question.
Jaguars EVP Tom Coughlin emphasized that Blake Bortles must avoid turnovers to maintain his starting job.
Speaking Friday, Jaguars EVP Tom Coughlin wouldn't completely commit to Blake Bortles as the starting quarterback.
Jaguars GM David Caldwell believes the team "can win a Super Bowl" with Blake Bortles at quarterback.
Jaguars EVP Tom Coughlin said, "Blake Bortles is our quarterback."
Blake Bortles said he will spend around 10 weeks working on his mechanics with Adam Dedeaux this offseason.
Blake Bortles said he played through "two shoulder separations" and wrist tendonitis this season.
Blake Bortles completed 25-of-39 passes for 301 yards, one touchdown and zero interceptions in the Jaguars' 24-20, Week 17 loss to the Colts.
ESPN's Chris Mortensen reports it is "common knowledge" GM Dave Caldwell believes Blake Bortles is a franchise quarterback.
Blake Bortles completed 26-of-38 passes for 325 yards and one touchdown in the Jaguars' Week 16 win over the Titans.
Jaguars interim coach Doug Marrone said he is "sticking with" Blake Bortles.
Speaking Monday, Jaguars GM Dave Caldwell said there will be no "mandate" for the team's new coach to stick with Blake Bortles at quarterback, but that he "still (believes) in Blake."