NFL's Cre'Von LeBlanc Honoring Incarcerated Brother With Rap Career, 'His Dream'

Philly Eagles cornerback Cre'Von LeBlanc says he's started a rap career to help his brother's dream come true ... telling TMZ Sports he wants to give him a platform after he gets out of prison. 26-year-old LeBlanc -- AKA "Strap" -- says what…