The word fat is a relative term. The normal guy-on-the-street is clinically obese at 25% body fat and above. A professional basketball player is overfat at 8% or above. Both Kyrie Irving and Marcus Smart were north of 10% body fat just prior to joining the NBA.

Irving was measured at the Combine prior to the draft at 10.2% body fat. Here is some further information on that, per Akron Beacon Journal.
8 years ago – via Akron Beacon Journal
Kyrie Irving’s body fat measured 10.