12-year-old Demarjay Smith, aka the Young Jamaican Trainer, is one of the most motivating people you’ll ever meet! COMMENT with an athlete who motivates YOU! MORE No Days Off → 7-Year-Old Football PRODIGY: http://whistle.video/NoDaysOffBlaze → 11-Year-Old Baseball PHENOM: http://whistle.video/JoeyBaseballNDO →…