Efficiency Ratings: Wisconsin

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

Latest Game:

Led by Tyus Jones and Jahlil Okafor, Duke's talented group of youngsters played like salty old pros down the stretch, outscoring Wisconsin by 14 points over the final 13 minutes Monday night to grit out a 68-63 victory for the program's fifth national title.

Okafor, the likely first pick in the NBA draft if he decides to leave, got outplayed by Badgers center Frank Kaminsky most of the night but came through like a veteran when the pressure was highest.

The 6-foot-11 freshman made two straight buckets over Kaminsky, sandwiched between a pair of 3-pointers from Jones, to help the Blue Devils (35-4) turn a one-time nine-point deficit into an eight-point lead with 1:22 left.

Among the eight players who share all the playing time are Okafor, his buddy, Jones, and another freshman, Justise Winslow. They all might playing at an NBA arena near you next season.

But Grayson Allen? The most unheralded of Krzyzewski's first-year players, who averages four points a game, stepped up with Okafor on the bench for much of the second half in foul trouble. Allen, the slam-dunk champion at the high school McDonald's All-American contest last year, scored 16 points and kept Duke in it when Okafor was on the bench with his third and fourth fouls and Wisconsin (36-4) looked like it was about to pull away.


(change from previous game)
  • Jahlil Okafor +6 (-13)
  • Justise Winslow +14 (-12)
  • Tyus Jones +22 (+11)
  • Quinn Cook +7 (-9)
  • Amile Jefferson +15 (+9)
  • Grayson Allen +16 (+8)
  • Matt Jones +3 (-5)
  • Marshall Plumlee -1 (-5)

Notes: In what is likely the final time he’ll wear a Duke uniform, Jahlil Okafor was the most human. In a season in which he reached a +30 mark nine times (the previous high was three times) and won ACC Player of the Year, Okafor was limited in the NCAA title game. But there was one three minute span in which Okafor came alive, hit a couple of tough shots, played good defense, and helped put Wisconsin behind for good. His +6 was, again, the least efficient performance of the year…and you can bet he doesn’t care.

Duke also didn’t get the usual brilliance from Cook who finished with just six points, four rebounds, and two assists while missing five of eight shots to finish with a +7. And it didn’t matter as Cook played strong defense and deferred to his backcourt mate, Tyus Jones, who hit for a game high +22 made up of 23 points on 7-of-13 shooting and a perfect 7-of-7 from the line.

Off the bench Duke got a major boost from Grayson Allen who got a lot of pub for his line of 16 points on 5-of-8 shooting, but also Amile Jefferson who scored a +15 thanks to making his only shot attempt of the game (a driving layup), but also recording three blocks and seven rebounds. Without those two and the defensive contributions of Matt Jones…Duke’s taking home the silver trophy instead of the gold.


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

Ten Most Efficient Performances

  • Jahlil Okafor v. Elon (+37)
  • Tyus Jones v. North Carolina (+34)
  • Jahlil Okafor v. NC State (+33)
  • Jahlil Okafor v. Furman (+32)
  • Jahlil Okafor v. San Diego State (+32)
  • Jahlil Okafor v. Boston College (+32)
  • Justise Winslow v. San Diego State (+31)
  • Jahlil Okafor v. Virginia Tech (+30)
  • Amile Jefferson v. Furman (+30)
  • Jahlil Okafor v. Wofford (+30)
  • Justise Winslow v. Syracuse (+29)

Five Least Efficient Performances*

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


Cumulative Season ratings for the Blue Devils. (E/game)*
  • Jahlil Okafor +780 (20.5)*
  • Justise Winslow +602 (15.4)
  • Tyus Jones +594 (15.2)
  • Quinn Cook +573 (14.7)
  • Amile Jefferson +409 (10.5)
  • Matt Jones +244 (6.3)
  • Marshall Plumlee +188 (4.8)
  • Grayson Allen +133 (3.8)*

*- Games Factored In: Allen (35); Okafor (38)


Cumulative Season ratings per minute for the Blue Devils. (E/minutes)
  • Jahlil Okafor: 0.682
  • Justise Winslow: 0.530
  • Marshall Plumlee: 0.501
  • Amile Jefferson: 0.492
  • Tyus Jones: 0.449
  • Grayson Allen: 0.413
  • Quinn Cook: 0.410
  • Matt Jones: 0.288


Tracking the most and least efficient performances by player
  • Jahlil Okafor 37 / 6
  • Amile Jefferson 30 / -1
  • Quinn Cook 29 / 0
  • Tyus Jones 34 / 1
  • Grayson Allen 28 / -3
  • Justise Winslow 31 / -5
  • Marshall Plumlee 19 / 0
  • Matt Jones 19 / -2


- As noted for the last few months, there was nobody that was going to catch Okafor. The big man finished the season as the first player in these ratings’ history to average more than 20.0 points per game and scored a +.682/minute score while doing it.

- When Duke recruited this wonderful freshman class the thinking was that only Okafor would be a sure fire one and done. Now, however, Winslow is considered among the seven best prospects in the draft and he’s played himself there. Same with Tyus Jones, though his draft stock is much lower (mid 20s). Their evolution is the reason Duke’s hanging a fifth banner and you can see it in the final ratings. Winslow went from sixth to second in five weeks after a string of performances that filled the stat sheet on a nightly basis with scoring, rebounding, much improved shooting, and similar. Meanwhile, Jones was less steady in terms of the scoring, but would always find ways to bump up his score - through scoring/shooting clinics, or handing out a team high 217 assists on the year. The classmates finished second and third respectively.

- The team’s captain, Quinn Cook finished fourth in the ratings and that tracks with how he played during the season. Cook was rated second through the early part of February, but as the freshmen began to grow and gain more and more confidence, Cook went from a big time scorer to almost a secondary option as the team started to gain momentum. It was a subtle change, but one that was both necessary and also an embodiment of how far the senior has come over the last four years.

- In turning to players who are likely to return next season, Amile Jefferson finished with a quiet 10.5 per game rating, which will likely go up next season as the soon to be senior will be asked to score the ball a bit more. It’ll be interesting to see how Duke works on that skill set - one he showed at the NBA Players Camp his senior season.

- Also, Grayson Allen’s emergence after minutes opened up will be something to watch this year. He’s shown himself capable of doing a little bit of everything and will be one of the program favorites (crowd, coaches, teammates) in the coming years.

- What a great season. We’ll see you next year.

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