Efficiency Ratings: NC State

As the Blue Devils progress through the season there will be many different theories on how to measure team success. TDD has adopted an 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

Latest Game:

Grayson Allen scored 28 points while freshman Brandon Ingram added 25 for the Blue Devils (15-5, 4-3 Atlantic Coast Conference), who trailed by 10 points late in the first half and 43-36 at halftime. But Duke shot 71 percent from the field, including 7 of 11 from 3-point range, and used a 14-0 run midway through the second half to take control and put the Wolfpack (11-9, 1-6) into catch-up mode.

"The start of the second half," Krzyzewski said, "we played some lights-out offensive basketball and really good defense."

It had been a rough two weeks for the reigning NCAA champions, whose reshaped roster had been short-handed ever since senior Amile Jefferson went out with a foot injury. They lost at Clemson then at home last weekend to Notre Dame and finally Monday to Syracuse, the program's first three-game skid since 2006-07 that might ultimately knock Duke out of the AP Top 25 for the first time since that season.


(change from previous game)

  • Grayson Allen +35 (+23)
  • Matt Jones +8 (-)
  • Brandon Ingram +27 (+10)
  • Amile Jefferson +DNP (-)
  • Marshall Plumlee +19 (-14)
  • Luke Kennard +7 (+10)
  • Derryck Thornton +4 (-2)
  • Chase Jeter DNP (-)
  • Antonio Vrankovic DNP (-)
  • Sean Obi +0 (+1)

Notes: As noted in the last game, Duke simply cannot afford at least one of Allen or Ingram not being very good to great on a nightly basis. There’s just not enough production coming from the rest of the six man rotation. Against NC State, Allen was great and Ingram was too. They combined for 53 points, 14 rebounds, 10 assists, 1 block, and 2 steals while shooting 21-of-33 from the floor. A lot of the success can be traced to both attacking the basket over settling for long jumpers, and neither got into foul trouble during the crucial periods of the game.

Outside of the dynamic duo, Duke got another steady performance inside by Marshall Plumlee who finished with 10 points and eight rebounds. Several of those rebounds were in traffic and helped Duke hold off the State rally.

New starter Luke Kennard once again struggled for most of the game, though not nearly as much as he did against Syracuse. When Kennard’s shot has been off, he’s had trouble of late contributing in other ways. That was the case again on Saturday when he grabbed just one rebound and had one assist in 31 minutes.


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

Ten Most Efficient Performances

  • Grayson Allen v. Georgetown (+38)
  • Brandon Ingram v. Georgia Southern (+38)
  • Brandon Ingram v. Elon (+35)
  • Grayson Allen v. NC State (+35)
  • Grayson Allen v. Long Beach State (+34)
  • Marshall Plumlee v. Syracuse (+33)
  • Marshall Plumlee v. Virginia Tech (+31)
  • Grayson Allen v. VCU (+30)
  • Luke Kennard v. Notre Dame (+30)
  • Grayson Allen v. Wake Forest (+29)
  • Grayson Allen v. Siena (+28)
  • Marshall Plumlee v. Wake Forest (+28)

Five Least Efficient Performances

  • Derryck Thornton (-5) v. Utah State
  • Grayson Allen (-4) v. Kentucky
  • Grayson Allen (-4) v. Utah
  • Chase Jeter (-3) v. Utah
  • Luke Kennard (-3) v. Syracuse


Cumulative Season ratings for the Blue Devils. (E/game)*

  • Grayson Allen +419 (21.0)
  • Brandon Ingram +366 (18.3)
  • Marshall Plumlee +319 (16.0)
  • Luke Kennard +236 (11.8)
  • Matt Jones +231 (11.6)
  • Amile Jefferson +177 (19.7)
  • Derryck Thornton +145 (7.3)
  • Chase Jeter +37 (2.2)
  • Antonio Vrankovic +11 (2.8)
  • Sean Obi 6 (0.7)



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

  • Antonio Vrankovic .846
  • Amile Jefferson .648
  • Grayson Allen .608
  • Brandon Ingram .573
  • Marshall Plumlee .554
  • Luke Kennard .474
  • Matt Jones .346
  • Chase Jeter .287
  • Sean Obi .286
  • Derryck Thornton .285


Tracking the most and least efficient performances by player

  • Grayson Allen 38/-4
  • Amile Jefferson 26/21
  • Brandon Ingram 38/-2
  • Matt Jones 25/0
  • Marshall Plumlee 33/4
  • Luke Kennard 30/-3
  • Chase Jeter 12/-3
  • Antonio Vrankovic 8/1
  • Derryck Thornton 20/-5
  • Sean Obi 3/0


- Matt Jones and Luke Kennard are back to within a one game margin for swapping spots in the cumulative rankings. Neither has shot overly well during ACC season (Kennard’s Notre Dame game excluded), but Kennard was able to shoot up the charts with an inconsistent diet of double figure games while Jones has averaged just a +7.3 since the start of league play.

- It’s essentially a six man rotation at this point. Chase Jeter has logged DNP’s in each of the last two games while Sean Obi has managed just two combined minutes.

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