Efficiency Ratings: North Carolina

As the Blue Devils progress through the season there will be many different theories on how to measure team success. TDD has adopted the NBA Efficiency Formula to track Duke's top players and performances after each game and throughout the season.

A quick way NBA coaches measure a player's game performance is by evaluating his efficiency. In order to find a player's efficiency the following formula is used:

((Points + Rebounds + Assists + Steals + Blocks) - ((Field Goals Att. - Field Goals Made) + (Free Throws Att. - Free Throws Made) + Turnovers)).

For example, compare the following stat lines:

Player A: 17 points (5-of-22 FG, 7-9 FT), 8 rebounds, 6 assists, 3 steals, 4 turnovers.

Player B: 15 points (5-8 FG, 3-4 FT), 4 rebounds, 7 assists, 2 turnovers

Who had the better game? Using the NBA formula player B, who hit five of eight shots and committed two turnovers registered a +20 efficiency total while Player A who missed 17 shots and had four turnovers had just a +11 rating.

For the second straight contest, it wasn't a pretty win, but it was a win. And it was a victory over arch-rival North Carolina, which makes the result all the more sweet. Duke once again started slowly, but hung around as the Tar Heels' small lineup game the Blue Devils all sorts of problems. Shortly after halftime Duke managed a five minute surge that built a lead which lasted for the rest of the contest as the Blue Devils won by five.

v. North Carolina
(change from previous game)

Notes: Mason Plumlee's slow start impacted his score and the overall game early on. Without their big man getting touches, and suffering through a high number of turnovers on the night, Duke was never able to establish any sort of offensive rhythm against the Heels. It resulted in 'just' a +18 for Plumlee. His points and rebounds (18 and 11) did well, as did his near 50 percent field goal percentage. What hurt him were turnovers (4) compared to assists (0), and a lower number of blocks and steals.

Much like his classmate, Seth Curry didn't have his best night, but he hit a couple of big perimeter jumpers when it counted to give Duke the lead. On the whole, however, Curry struggled by hitting just 30 percent of his jumpers. The senior did rebound well (5), but his shooter woes and negative assist to turnover ration lowered his overall score to a +8.

Another Blue Devil who struggled with assists versus turnovers was the usually reliable Quinn Cook. The sophomore handed out just two assists against five turnovers, but shot 50 percent from the floor and rebounded the ball (6) to post a +19.

Off the bench Duke got a big lift from Tyler Thornton who hit three big perimeter jumpers, and made a couple of crucial hustle plays to keep possession alive. Thornton finished the night with a +10 rating.

Throughout the season TDD will track the various highs and lows using the formula.

Ten Most Efficient Performances

  • Mason Plumlee v. NC State (+36)
  • Quinn Cook v. Clemson (+36)
  • Mason Plumlee v. Wake Forest (+35)
  • Mason Plumlee v. Florida Gulf Coast (+34)
  • Mason Plumlee v. Minnesota (+34)
  • Mason Plumlee v. Ohio State (+31)
  • Mason Plumlee v. Santa Clara (+30)
  • Mason Plumlee v. Georgia State (+29)
  • Mason Plumlee v. Elon (+28)
  • Quinn Cook v. NC State (+26)
  • Seth Curry v. Minnesota (+26)

Five Least Efficient Performances*
  • Seth Curry v. Miami (-8)
  • Rasheed Sulaimon v. NC State (-6)
  • Tyler Thornton v. Miami (-3)
  • Seth Curry v. Ohio State (-2)
  • Alex Murphy v. Florida Gulf Coast (-1)
  • Josh Hairston v. Georgia State (-1)
*- players must play at least five minutes or factor into the box score to be considered for per game E-ratings
Cumulative Season ratings for the Blue Devils. (E/game)*
  • Mason Plumlee: 564 (23.5)
  • Quinn Cook: 370 (15.4)
  • Seth Curry: 293 (12.7)
  • Rasheed Sulaimon: 257 (10.7)
  • Ryan Kelly: 229 (16.4)
  • Amile Jefferson: 149 (6.5)
  • Tyler Thornton: 149 (6.2)
  • Josh Hairston: 66 (2.9)
  • Alex Murphy: 43 (2.0)
  • Marshall Plumlee: 1 (0.1)

Cumulative Season ratings per minute for the Blue Devils. (E/minutes)

  • Mason Plumlee: 0.683
  • Ryan Kelly: 0.573
  • Amile Jefferson: 0.467
  • Quinn Cook: 0.453
  • Seth Curry: 0.414
  • Rasheed Sulaimon: 0.361
  • Alex Murphy: 0.295
  • Tyler Thornton: 0.288
  • Josh Hairston: 0.232
  • Marshall Plumlee: 0.028

Tracking the most and least efficient performances by player

  • Mason Plumlee: 36/9
  • Quinn Cook: 36/3
  • Tyler Thornton: 16/-3
  • Rasheed Sulaimon: 16/-6
  • Ryan Kelly: 23/10
  • Seth Curry: 26/-8
  • Amile Jefferson: 16/0
  • Alex Murphy: 13/-1
  • Marshall Plumlee: 2/0
  • Josh Hairston: 9/-1

Notes: Thornton's big game moved him up the season cumulative ratings, and into a tie with Jefferson for sixth place. Jefferson is still more efficient on the offensive end (and has played in one less game). Thornton is also moving closer to Alex Murphy in the E/min category despite playing a large number of minutes more.

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