Efficiency Ratings: Virginia

Using an NBA Efficiency Rating Formula, TDD tracks the best statistical performances of 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 above referenced 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.


Jones scored 17 points, Cook had 15 and both made critical 3-pointers in the closing minutes, fueling a game-ending 16-5 run that gave the Blue Devils a 69-63 victory against No. 2 Virginia, ending the Cavaliers' 21-game home winning streak.

Cook hit three times from long range in the final 4:38, and Jones hit the clincher with about 10 seconds left, capping a dramatic turnaround that had seen the Blue Devils miss their first nine 3-point tries and 11 of their first 13.

Then, with Virginia leading by eight with 4:48 to play and its sell-out crowd looking for the kill shot, Duke's only hope was to start converting, and it did, making five of its last six shots. When Jones' 3 fell, pushing the Blue Devils' lead to six, and the Cavaliers accepted their fate, it brought a positive end to what has been a wild week for Duke.

The Blue Devils (18-3, 5-3 Atlantic Coast Conference) finished 28-for-55 (50.9 percent) and became the first team to shoot 50 percent against the Cavaliers this season.

Winslow added 15, and Okafor had 10 points and nine rebounds.


(change from previous game)
  • Jahlil Okafor +18 (-10)
  • Justise Winslow +20 (+9)
  • Tyus Jones +18 (+3)
  • Quinn Cook +13 (-)
  • Amile Jefferson +3 (—1)
  • Grayson Allen -2 (—2)
  • Matt Jones +10 (+3)
  • Marshall Plumlee 0 (+2)

Notes: It was the best game Winslow has played in nearly six weeks. The freshman forward - who finally looked healthy - scored 15 points and grabbed 11 rebounds while shooting well from the floor (7-of-16). He also tossed in two assists, a steal, and a block. In short he did a little bit of everything to keep Duke ahead and then in the game before the guards took over.

Speaking of the guards, both Jones and Cook shot over 50 percent from the floor (thanks to the late flurry from both) to finish with a combined +31. Jones connected on 50 percent of his field goals (Cook hit 60 percent) and 5-of-6 from the line to bump to a +18. He also had four assists against just one turnover.

It was a slow start in the middle for Okafor, who didn’t have a shot attempt until there was less than three minutes remaining in the first half. The big man also committed a season high five turnovers, which pulled his score down to +18. Otherwise it was the usual super efficient night as the big man scored (10), rebounded (9), shot well (5-of-7), and added a block and a few steals.

With the departure of Sulaimon, the wing minutes went to Matt Jones and Grayson Allen. Jones responded with a nice line of nine points and three boards, and while Allen was aggressive, he’ll need some more time to adjust to the new role.


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

Ten Most Efficient Performances

  • Jahlil Okafor v. Elon (+37)
  • Jahlil Okafor v. NC State (+33)
  • Jahlil Okafor v. Furman (+32)
  • Jahlil Okafor v. Boston College (+32)
  • Amile Jefferson v. Furman (+30)
  • Jahlil Okafor v. Wofford (+30)
  • Jahlil Okafor v. Toledo (+28)
  • Jahlil Okafor v. Presbyterian (+28)
  • Jahlil Okafor v. Notre Dame (+28)
  • Tyus Jones v. Toledo (+27)

Five Least Efficient Performances*

  • Rasheed Sulaimon (-6) v. Connecticut
  • Justise Winslow (-5) v. Miami
  • Rasheed Sulaimon (-4) v. Temple
  • Grayson Allen (-3) v. Boston College
  • Matt Jones (-2) v. Elon


Cumulative Season ratings for the Blue Devils. (E/game)*
  • Jahlil Okafor +474 (22.6)
  • Tyus Jones +306 (14.6)
  • Quinn Cook +302 (14.4)
  • Amile Jefferson +278 (13.2)
  • Justise Winslow +227 (10.4)
  • Rasheed Sulaimon +133 (6.7)*
  • Marshall Plumlee +109 (5.5)
  • Matt Jones +105 (5.0)
  • Grayson Allen +39 (2.3)*

*- Games Factored In: Allen (16); Sulaimon (20)


Cumulative Season ratings per minute for the Blue Devils. (E/minutes)
  • Jahlil Okafor: 0.736
  • Marshall Plumlee: 0.589
  • Amile Jefferson: 0.569
  • Tyus Jones: 0.474
  • Quinn Cook: 0.415
  • Justise Winslow: 0.397
  • Grayson Allen: 0.358
  • Rasheed Sulaimon: 0.345
  • Matt Jones: 0.288


Tracking the most and least efficient performances by player
  • Jahlil Okafor 37 / 13
  • Amile Jefferson 30 / 3
  • Quinn Cook 24 / 6
  • Tyus Jones 27 / 1
  • Grayson Allen 22 / -3
  • Rasheed Sulaimon 20 / -6
  • Justise Winslow 21 / -5
  • Marshall Plumlee 17 / 0
  • Matt Jones 16 / -2


- Jones jumped back over Cook for second place in the season standings, while Allen’s extended minutes reduced his per minute score by more than .100 points. Jones and Cook have created some breathing room between them and Jefferson, leading him by 24 and 28 points respectively.

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