Marvin Bagley III -- the Sacramento Kings’ #2 overall pick in the 2018 NBA Draft -- is jumping on a new track with boxing legend Roy Jones Jr. ... with both stars letting world know they’re more than athletes ... they’re rappers too!!
The new track is called "Y’all Must’ve Forgot II" ... a direct throwback to Roy’s "Ya’ll Must’ve Forgot" from his 2002 project, "Round One: The Album."
The 22-year-old Bagley -- who raps under the artist name MB3FIVE -- goes hard on the track over a booming southern rap beat .