NASCAR XFINITY SERIES AT LAS VEGAS
Las Vegas Motor Speedway — September 15, 2018
Ross Chastain
Winner
200
Laps
40
Entries
4
Leaders
Ross Chastain won the 2018 NASCAR XFINITY SERIES AT LAS VEGAS at Las Vegas Motor Speedway on September 15, 2018, leading 180 of 200 laps. Justin Allgaier finished second; Cole Custer rounded out the podium. The race featured 4 different leaders.
Race Details
Date
Saturday, September 15, 2018
Track
Season
2018
Winner
Leaders
4 drivers
| Pos | Start | +/- | Driver |
|---|---|---|---|
| 1 | 5 | +4 | Ross Chastain |
| 2 | 8 | +6 | Justin Allgaier |
| 3 | 1 | -2 | Cole Custer |
| 4 | 4 | — | Christopher Bell |
| 5 | 3 | -2 | Elliott Sadler |
| 6 | 34 | +28 | Ryan Preece |
| 7 | 36 | +29 | Brandon Jones |
| 8 | 38 | +30 | Ryan Truex |
| 9 | 2 | -7 | Austin Cindric |
| 10 | 14 | +4 | Spencer Gallagher |
| 11 | 18 | +7 | J.J. Yeley |
| 12 | 10 | -2 | Ryan Sieg |
| 13 | 12 | -1 | Jeremy Clements |
| 14 | 16 | +2 | Landon Cassill |
| 15 | 17 | +2 | Joey Gase |
| 16 | 15 | -1 | Alex Labbe |
| 17 | 21 | +4 | Ray Black, Jr. |
| 18 | 39 | +21 | Garrett Smithley |
| 19 | 23 | +4 | B.J. McLeod |
| 20 | 31 | +11 | Josh Williams |
| 21 | 22 | +1 | Cole Rouse |
| 22 | 27 | +5 | Spencer Boyd |
| 23 | 20 | -3 | Max Tullman |
| 24 | 19 | -5 | Bayley Currey |
| 25 | 29 | +4 | Chad Finchum |
| 26 | 33 | +7 | Vinnie Miller |
| 27 | 26 | -1 | Josh Bilicki |
| 28 | 7 | -21 | Tyler Reddick |
| 29 | 35 | +6 | Daniel Hemric |
| 30 | 6 | -24 | Shane Lee |
| 31 | 13 | -18 | Chase Briscoe |
| 32 | 24 | -8 | David Starr |
| 33 | 28 | -5 | Mike Harmon |
| 34 | 25 | -9 | Timmy Hill |
| 35 | 11 | -24 | Ryan Reed |
| 36 | 37 | +1 | Matt Tifft |
| 37 | 40 | +3 | Stan Mullis |
| 38 | 32 | -6 | John Jackson |
| 39 | 30 | -9 | Jeff Green |
| 40 | 9 | -31 | Michael Annett |
Model Performance
How well did the NR-Rating model predict this race? Across 16 matched drivers, the model averaged 10.6 positions off — worse than the season average of 8.5. Below Average
| Pos | Driver | Predicted | Actual | Delta |
|---|---|---|---|---|
| 1 | Ross Chastain | 13.3 | 1 | +12.3 |
| 2 | Justin Allgaier | 18.3 | 2 | +16.3 |
| 3 | Cole Custer | 22.9 | 3 | +19.9 |
| 4 | Christopher Bell | 10.7 | 4 | +6.7 |
| 6 | Ryan Preece | 10.1 | 6 | +4.1 |
| 8 | Ryan Truex | 15.4 | 8 | +7.4 |
| 9 | Austin Cindric | 15.4 | 9 | +6.4 |
| 11 | J.J. Yeley | 28.8 | 11 | +17.8 |
| 15 | Joey Gase | 23.4 | 15 | +8.4 |
| 19 | B.J. McLeod | 24.8 | 19 | +5.8 |
| 25 | Chad Finchum | 26.4 | 25 | +1.4 |
| 27 | Josh Bilicki | 28.6 | 27 | +1.6 |
| 28 | Tyler Reddick | 6.2 | 28 | -21.8 |
| 31 | Chase Briscoe | 11.9 | 31 | -19.1 |
| 32 | David Starr | 20.9 | 32 | -11.1 |
| 34 | Timmy Hill | 23.9 | 34 | -10.1 |
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
- Ross Chastain: has 28 career starts at Las Vegas Motor Speedway with a 14.2 avg finish (1 win) — the model may have underweighted this track history.
- Tyler Reddick: was the model’s top pick based on 22 career starts at Las Vegas Motor Speedway with a 12.8 avg finish (2 wins), finishing P28 on the day.
- Cole Custer: was the biggest surprise, finishing P3 vs predicted P23. Track history: 17 starts, 12.8 avg finish.
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Frequently Asked Questions
Who won the 2018 NASCAR XFINITY SERIES AT LAS VEGAS?
Ross Chastain won the 2018 NASCAR XFINITY SERIES AT LAS VEGAS at Las Vegas Motor Speedway.
Where was the 2018 NASCAR XFINITY SERIES AT LAS VEGAS held?
The 2018 NASCAR XFINITY SERIES AT LAS VEGAS was held at Las Vegas Motor Speedway on September 15, 2018.