This Achievement unlocks at the end of the game if you get 22 or more assists with one player.
Set up a game using a good team (like Florida) against a weak team (like Hartford) and crank the sliders up in your favour while reducing the sliders against the CPU. When you get possession of the ball, get the ball to the player you want to earn the assists. After he gets the ball, pass it off again to another player and immediately go for a high-percentage shot (slam dunk, lay-up) to earn the assist. Repeat until you reach 22 assists and the Achievement will unlock at the end of the game.
Increase the length of the halves from the pre-game options if you are having difficulty getting 22 before the end of the game.