Effiiency 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 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 23 points, and Thornton came up with the clinching block on the final play to help Duke edge No. 5 North Carolina 74-73 on Wednesday night. Entering Wednesday, only 15 points separated the two teams in their 89 meetings.

Allen hit a pair of free throws with 1:09 left for the lead. Then Duke (20-6, 9-4 Atlantic Coast Conference) came up with a pair of stops in the final minute, finishing strong after trailing most of the way while North Carolina's Brice Johnson put together a huge performance.

Johnson had 29 points and 19 rebounds for North Carolina, which came in with a decided edge in size and depth. But Johnson got little help outside of Justin Jackson's 13 points, with the Tar Heels sputtering down the stretch after leading by eight with about 7 minutes left and Duke owning a 6.4 percent win probability, according to KenPom.com.


vs.North Carolina

(change from previous game)
  • Grayson Allen +17 (-2)
  • Matt Jones -2 (-15)
  • Brandon Ingram +22 (+7)
  • Amile Jefferson +DNP (-)
  • Marshall Plumlee +17 (+3)
  • Luke Kennard +13 (+14)
  • Derryck Thornton +5 (-3)
  • Chase Jeter +0 (-)
  • Antonio Vrankovic DNP (-)
  • Sean Obi DNP (-)

Notes: Ingram managed a +22 despite missing nine of his first 11 shots on the night. After that he hit five of his last nine attempts and converted all his free throws while also rebounding (7) well. And he did it while playing the full 40 minutes.

Joining Ingram in double figure rating were Plumlee and Allen with +17s each. Allen’s score was actually lowered by missing 11 shots while Plumlee posted his score by making all five field goal attempts and rebounding (7) well.

After Jones went down with injury, Luke Kennard notched a +13 thanks to a 67 percent field goal percentage.


MEMORABLE SEASON PERFORMANCES

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

SEASON EFFICIENCY RATING

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

  • Grayson Allen +534 (20.5)
  • Brandon Ingram +483 (18.6)
  • Marshall Plumlee +413 (15.9)
  • Luke Kennard +300 (11.5)
  • Matt Jones +267 (10.8)
  • Derryck Thornton +186 (7.2)
  • Amile Jefferson +177 (19.7)
  • Chase Jeter +43 (2.0)
  • Antonio Vrankovic +10 (2.0)
  • Sean Obi 6 (0.7)

1716)

MOST EFFICIENT PER MINUTE

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

  • Antonio Vrankovic .714
  • Amile Jefferson .648
  • Grayson Allen .579
  • Brandon Ingram .557
  • Marshall Plumlee .525
  • Luke Kennard .468
  • Matt Jones .314
  • Sean Obi .286
  • Derryck Thornton .284
  • Chase Jeter .279

SEASON HIGH/LOW PERFORMANCES


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

Notes:

- Despite playing huge minutes, both Allen and Ingram are putting up very efficient scores both in the overall score and the per minute tallies.

- Duke will start five players against Louisville with Plumlee, Allen, Thornton, Kennard, and Ingram. Plumlee has appeared in 144 games in his career. The remaining four starters will have appeared in 143 before the game.


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