Johnny Basketball
The Slam Man
Dunk Dunk Goose
Even More Magical Johnson
Basket Maker
Trick Shot Jim
The Scary Man
Better Bronny
The Bad Guy of Basketball
not exactly a nickname, but wear a name tag on your jersey that says “I PUNCH”
George “Three Points” Bush
Adam Passtheball
Jake Shoottheball
Defensive Rebound
Russell Westbrook
The Average-Sized Baby
Vaguely European
Twisters McGee!
Bigass Whiteguy
The Guy from the Celtics Who had a Bisexual Threesome with your Parents

There is actually an NBA player with the nickname "Basketball Paul"