Efficiency Ratings: Virginia Tech

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:

Marshall Plumlee scored a career-high 21 points and the Blue Devils burst out of the gate with an outside-shooting flurry to beat the Hokies 82-58 on Saturday.

Freshman Brandon Ingram added 16 points, nine rebounds and six blocks for the Blue Devils (14-2, 3-0 Atlantic Coast Conference), who hit seven 3-pointers in the opening seven minutes to quickly turn the game into a rout.

Duke was coming off a 91-75 win at Wake Forest on Wednesday, though the Blue Devils had to overcome foul trouble to pull away late. But Duke ran out to a 12-2 lead on the way to a 27-point halftime margin Saturday against a team coming off an upset of fourth-ranked Virginia.


(change from previous game)

  • Grayson Allen +14 (-15)
  • Matt Jones +13 (+13)
  • Brandon Ingram +25 (+3)
  • Amile Jefferson +DNP (-)
  • Marshall Plumlee +31 (+3)
  • Luke Kennard +10 (-17)
  • Derryck Thornton +3 (-2)
  • Chase Jeter +1 (+1)
  • Antonio Vrankovic DNP (-)
  • Sean Obi DNP (-)

Notes: For the second straight game Plumlee scored and rebounded well, and the manner in which he went about his business was tailor-made for these ratings. Against Wake Forest the senior didn’t miss from the field. Against the Hokies, he missed once from the field and once from the charity stripe, but scored more points and grabbed more boards. The result is a new career high in both points and in these ratings. To put his career in perspective, the combined +59 he’s recorded in two games this week is greater than his first two season totals at Duke.

Meanwhile, Ingram scored a +25 while Allen managed just a +14. Ingram’s higher score was due to scoring the same amount of points on seven fewer field goal attempts. And while both rebounded well (Allen 7 and Ingram 9), the real difference in the two scores was in turnovers (Allen 3, Ingram 2) and blocked shots (Ingram had a career best 6).

Freshman point guard Derryck Thornton actually recorded a career best seven assists on the night, but his five turnovers and eight misses in 10 field goal attempts reduced his scored down to just a +3.


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. Long Beach State (+34)
  • Marshall Plumlee v. Virginia Tech (+31)
  • Grayson Allen v. VCU (+30)
  • Grayson Allen v. Wake Forest (+29)
  • Grayson Allen v. Siena (+28)
  • Marshall Plumlee v. Wake Forest (+28)
  • Luke Kennard v. Utah (+28)
  • Luke Kennard v. Wake Forest (+27)
  • Brandon Ingram v. Indiana (+26)

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
  • Brandon Ingram (-2) v. Kentucky


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

  • Grayson Allen +341 (21.3)
  • Brandon Ingram +286 (17.9)
  • Marshall Plumlee +236 (14.8)
  • Matt Jones +206 (12.9)
  • Luke Kennard +195 (12.2)
  • Amile Jefferson +177 (19.7)
  • Derryck Thornton +123 (7.7)
  • Chase Jeter +36 (2.4)
  • Antonio Vrankovic +11 (2.8)
  • Sean Obi 6 (1.0)

*- Games Factored In: Obi (6); Vrankovic (4); Jeter (15)


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

  • Antonio Vrankovic .846
  • Amile Jefferson .648
  • Grayson Allen .633
  • Brandon Ingram .575
  • Marshall Plumlee .557
  • Luke Kennard .524
  • Matt Jones .392
  • Sean Obi .375
  • Chase Jeter .288
  • Derryck Thornton .287


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 31/4
  • Luke Kennard 28/0
  • Chase Jeter 12/-3
  • Antonio Vrankovic 8/1
  • Derryck Thornton 20/-5
  • Sean Obi 3/0


- Here’s a crazy stat that would have gotten great casino odds on before the season. After 16 games Marshall Plumlee’s season efficiency total is closer to Brandon Ingram than Ingram is to Grayson Allen. And, it’s not wrong to say that Plumlee has been Duke’s most consistent player this year. He’s the only rotational player who hasn’t laid a total egg in at least one game this season aside from Jefferson - who, of course, is out for a while.

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