NASCAR Xfinity Series at Iowa
Iowa Speedway — June 15, 2024
Sam Mayer
Winner
253
Laps
38
Entries
8
Leaders
Sam Mayer won the 2024 NASCAR Xfinity Series at Iowa at Iowa Speedway on June 15, 2024, leading 47 of 253 laps. Riley Herbst finished second; Corey Heim rounded out the podium. The race featured 8 different leaders.
Race Details
| Pos | Start | +/- | Driver |
|---|---|---|---|
| 1 | 5 | +4 | Sam Mayer |
| 2 | 12 | +10 | Riley Herbst |
| 3 | 22 | +19 | Corey Heim |
| 4 | 17 | +13 | Sammy Smith |
| 5 | 3 | -2 | Sheldon Creed |
| 6 | 7 | +1 | Cole Custer |
| 7 | 24 | +17 | Matt DiBenedetto |
| 8 | 6 | -2 | Chandler Smith |
| 9 | 28 | +19 | Ross Chastain |
| 10 | 37 | +27 | Daniel Dye |
| 11 | 10 | -1 | Parker Kligerman |
| 12 | 15 | +3 | Ryan Sieg |
| 13 | 25 | +12 | Leland Honeyman Jr. |
| 14 | 20 | +6 | Ryan Ellis |
| 15 | 19 | +4 | Anthony Alfredo |
| 16 | 36 | +20 | Joey Gase |
| 17 | 31 | +14 | David Starr |
| 18 | 29 | +11 | Brett Moffitt |
| 19 | 21 | +2 | Kyle Sieg |
| 20 | 27 | +7 | Josh Williams |
| 21 | 16 | -5 | Jeremy Clements |
| 22 | 34 | +12 | Dawson Cram |
| 23 | 32 | +9 | Patrick Emerling |
| 24 | 30 | +6 | Jeb Burton |
| 25 | 33 | +8 | Hailie Deegan |
| 26 | 35 | +9 | Garrett Smithley |
| 27 | 8 | -19 | John Hunter Nemechek |
| 28 | 14 | -14 | Brennan Poole |
| 29 | 1 | -28 | Austin Hill |
| 30 | 4 | -26 | Justin Allgaier |
| 31 | 9 | -22 | Jesse Love |
| 32 | 13 | -19 | Parker Retzlaff |
| 33 | 23 | -10 | Kyle Weatherman |
| 34 | 2 | -32 | Shane van Gisbergen |
| 35 | 18 | -17 | Blaine Perkins |
| 36 | 26 | -10 | Brandon Jones |
| 37 | 11 | -26 | A.J. Allmendinger |
| 38 | 38 | — | Glen Reen |
Model Performance
How well did the NR-Rating model predict this race? Across 15 matched drivers, the model averaged 10.8 positions off — worse than the season average of 8.5. Below Average
| Pos | Driver | Predicted | Actual | Delta |
|---|---|---|---|---|
| 2 | Riley Herbst | 21.4 | 2 | +19.4 |
| 3 | Corey Heim | 21.0 | 3 | +18.0 |
| 6 | Cole Custer | 22.9 | 6 | +16.9 |
| 9 | Ross Chastain | 13.3 | 9 | +4.3 |
| 10 | Daniel Dye | 26.1 | 10 | +16.1 |
| 15 | Anthony Alfredo | 20.9 | 15 | +5.9 |
| 16 | Joey Gase | 23.4 | 16 | +7.4 |
| 17 | David Starr | 20.9 | 17 | +3.9 |
| 27 | John Hunter Nemechek | 19.1 | 27 | -7.9 |
| 28 | Brennan Poole | 24.7 | 28 | -3.3 |
| 29 | Austin Hill | 21.4 | 29 | -7.6 |
| 30 | Justin Allgaier | 18.3 | 30 | -11.7 |
| 31 | Jesse Love | 25.7 | 31 | -5.3 |
| 34 | Shane van Gisbergen | 18.3 | 34 | -15.7 |
| 37 | A.J. Allmendinger | 18.3 | 37 | -18.7 |
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: was the model’s top pick based on 19 career starts at Iowa Speedway with a 14.8 avg finish, finishing P9 on the day.
- Riley Herbst: was the biggest surprise, finishing P2 vs predicted P21. Track history: 5 starts, 13.2 avg finish.
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Frequently Asked Questions
Who won the 2024 NASCAR Xfinity Series at Iowa?
Sam Mayer won the 2024 NASCAR Xfinity Series at Iowa at Iowa Speedway.
Where was the 2024 NASCAR Xfinity Series at Iowa held?
The 2024 NASCAR Xfinity Series at Iowa was held at Iowa Speedway on June 15, 2024.