Instructions
Pass the ball to a player with a higher dunk rating using the "X" button. (You can view ratings on the player rosters.) This will increase the chances of the player dunking when near the basket.
Hold down the "R2" turbo button to make the player charge toward the basket.
Press "Up" on the right analog stick when near the basket.
Dunk on putbacks near the rim by pressing "R2" and the "Triangle" button.