NASCAR XFINITY SERIES AT CHICAGO
Chicagoland Speedway — September 16, 2017
Justin Allgaier
Winner
200
Laps
40
Entries
5
Leaders
Justin Allgaier won the 2017 NASCAR XFINITY SERIES AT CHICAGO at Chicagoland Speedway on September 16, 2017, leading 15 of 200 laps. Kyle Larson finished second; Elliott Sadler rounded out the podium. The race featured 5 different leaders.
Race Details
Date
Saturday, September 16, 2017
Track
Season
2017
Winner
Leaders
5 drivers
| Pos | Start | +/- | Driver |
|---|---|---|---|
| 1 | 14 | +13 | Justin Allgaier |
| 2 | 3 | +1 | Kyle Larson |
| 3 | 6 | +3 | Elliott Sadler |
| 4 | 9 | +5 | Daniel Hemric |
| 5 | 13 | +8 | Austin Dillon |
| 6 | 7 | +1 | Matt Tifft |
| 7 | 5 | -2 | Cole Custer |
| 8 | 17 | +9 | Ty Dillon |
| 9 | 11 | +2 | Blake Koch |
| 10 | 16 | +6 | Bubba Wallace |
| 11 | 12 | +1 | Brennan Poole |
| 12 | 15 | +3 | Brandon Jones |
| 13 | 19 | +6 | Brendan Gaughan |
| 14 | 24 | +10 | Spencer Gallagher |
| 15 | 18 | +3 | Michael Annett |
| 16 | 20 | +4 | Dakoda Armstrong |
| 17 | 10 | -7 | Ryan Reed |
| 18 | 1 | -17 | Erik Jones |
| 19 | 2 | -17 | Daniel Suarez |
| 20 | 23 | +3 | Jeremy Clements |
| 21 | 25 | +4 | J.J. Yeley |
| 22 | 34 | +12 | David Starr |
| 23 | 21 | -2 | Ross Chastain |
| 24 | 22 | -2 | Ryan Sieg |
| 25 | 27 | +2 | Harrison Rhodes |
| 26 | 4 | -22 | Ryan Blaney |
| 27 | 29 | +2 | Joey Gase |
| 28 | 37 | +9 | Spencer Boyd |
| 29 | 31 | +2 | Vinnie Miller |
| 30 | 35 | +5 | Chris Cockrum |
| 31 | 32 | +1 | Mario Gosselin |
| 32 | 39 | +7 | Mike Harmon |
| 33 | 8 | -25 | William Byron |
| 34 | 30 | -4 | Josh Bilicki |
| 35 | 26 | -9 | B.J. McLeod |
| 36 | 28 | -8 | Timmy Hill |
| 37 | 33 | -4 | Garrett Smithley |
| 38 | 38 | — | Morgan Shepherd |
| 39 | 36 | -3 | Jeff Green |
| 40 | 40 | — | Matt Mills |
Model Performance
How well did the NR-Rating model predict this race? Across 18 matched drivers, the model averaged 10.2 positions off — worse than the season average of 8.5. Below Average
| Pos | Driver | Predicted | Actual | Delta |
|---|---|---|---|---|
| 1 | Justin Allgaier | 18.3 | 1 | +17.3 |
| 2 | Kyle Larson | 12.7 | 2 | +10.7 |
| 5 | Austin Dillon | 17.1 | 5 | +12.1 |
| 7 | Cole Custer | 22.9 | 7 | +15.9 |
| 8 | Ty Dillon | 23.4 | 8 | +15.4 |
| 10 | Bubba Wallace | 12.7 | 10 | +2.7 |
| 11 | Brennan Poole | 24.7 | 11 | +13.7 |
| 18 | Erik Jones | 16.7 | 18 | -1.3 |
| 19 | Daniel Suarez | 14.0 | 19 | -5.0 |
| 21 | J.J. Yeley | 28.8 | 21 | +7.8 |
| 22 | David Starr | 20.9 | 22 | -1.1 |
| 23 | Ross Chastain | 13.3 | 23 | -9.7 |
| 26 | Ryan Blaney | 9.2 | 26 | -16.8 |
| 27 | Joey Gase | 23.4 | 27 | -3.6 |
| 33 | William Byron | 10.7 | 33 | -22.3 |
| 34 | Josh Bilicki | 28.6 | 34 | -5.4 |
| 35 | B.J. McLeod | 24.8 | 35 | -10.2 |
| 36 | Timmy Hill | 23.9 | 36 | -12.1 |
Predicted finish from NR-Rating model. Delta = predicted − actual (positive = driver beat prediction). Confidence: High Confidence = low variance (stdDev ≤ 9), Moderate = medium variance, Coinflip = high variance.
Historical Context
- Justin Allgaier: has 12 career starts at Chicagoland Speedway with a 13.8 avg finish (1 win) — the model may have underweighted this track history.
- Ryan Blaney: was the model’s top pick based on 10 career starts at Chicagoland Speedway with a 12.8 avg finish, finishing P26 on the day.
Explore More
Frequently Asked Questions
Who won the 2017 NASCAR XFINITY SERIES AT CHICAGO?
Justin Allgaier won the 2017 NASCAR XFINITY SERIES AT CHICAGO at Chicagoland Speedway.
Where was the 2017 NASCAR XFINITY SERIES AT CHICAGO held?
The 2017 NASCAR XFINITY SERIES AT CHICAGO was held at Chicagoland Speedway on September 16, 2017.