YKDV Bossman Fat will not have to pursue his rapping career this fall. He’s got another gig lined up — and he doesn’t have to travel too far from his college football home to get there. The Indianapolis Colts have signed Kelvin Joseph to their practice squad, the franchise announced Wednesday. That move comes following the knee injury of starting defensive back JuJu Brents, who was just placed on injured reserve. Veteran Chris Lammons was promoted to the active roster, opening up a spot for the former Kentucky standout. Joseph, a former second-round pick in the 2021 NFL Draft, will wear No. 38…