You're looking at it the wrong way still.
Player 1: Opponent shot 0-0 (prevented 0 points)
Player 2: Opponent shot 0-1 (prevented 2 points)
Player 3: Opponent shot 0-2 (prevented 4 points)
Player 4: Opponent shot 0-3 (prevented 6 points)
Player 5: Opponent shot 0-4 (prevented 8 points)
Player 6: Opponent shot 0-5 (prevented 10 points)
Player 7: Opponent shot 0-6 (prevented 12 points)
Player 8: Opponent shot 0-7 (prevented 14 points)
Player 9: Opponent shot 0-8 (prevented 16 points)
Player 10: Opponent shot 0-9 (prevented 18 points)
Player 11: Opponent shot 0-10 (prevented 20 points)
Player 12: Opponent shot 0-11 (prevented 22 points)
Player 13: Opponent shot 0-12 (prevented 24 points)
Player 14: Opponent shot 0-13 (prevented 26 points)
Player 15: Opponent shot 0-14 (prevented 28 points)
Player 16: Opponent shot 0-15 (prevented 30 points)
Player 17: Opponent shot 0-16 (prevented 32 points)
Player 18: Opponent shot 1-17 (prevented 32 / allowed 2 points)
The more points a player prevents, the more possessions are wasted (because possessions in a game are limited).
The more possessions (empty trips), the less points a team will score as a total. It doesn't matter if a player shoots 10-40, even if he scored 25 points, the defender still did a magnificent job in defending them.
16 empty trips (player 17) is the best, player 18 is 2nd best, 16 can be a tie with 18 and then it goes up the chart..