William Byron saves fuel to the max in suspenseful NASCAR Cup win at Iowa: An extraordinary spat of cautions in Sunday’s Iowa Corn 350 Powered by Ethanol allowed William Byron to save an extraordinary amount of fuel, and that proved the difference in Byron’s second victory of the season and first since the DAYTONA 500. Squeezing 144 laps out of his fuel cell at an Iowa Speedway track where the fuel window is roughly 100 laps, Byron crossed the finish line ahead of a trio of pursuers—pole winner Chase Briscoe, first and second stage winner Brad Keselowski and defending race winner Ryan Blaney—all on different strategies.[Read More]
#24-William Byron won the Iowa Corn 350 NASCAR Cup Series race at Iowa Speedway. The win is his second win of the year, first at Iowa and 15th career win.
Pole sitter #19-Chase Briscoe finished 2nd followed by #6-Brad Keselowski, #12-Ryan Blaney, #60-Ryan Preece, #23-Bubba Wallace, #48-Alex Bowman, #77-Carson Hocevar, #22-Joey Logano, and #3-Austin Dillon.
Byron led 141 laps, the most of anyone. The team originally thought he would be short on fuel, but a rash of late race cautions allowed him to save enough to make it to the finish without issue.
Stages 1 & 2 were both won by #6-Brad Keselowski.
The fastest lap bonus a earned by #6-Brad Keselowski.
There were 10 lead changes among 6 drivers and 12 cautions for 72 yellow flag laps.
The average speed of the race was: 92.905mph.
See race details at: Race Results, Driver Points Standings, Owner Points Standings, Cumulative Report, Penalty Report.
Race Fast Facts – Iowa:
William Byron won the Iowa Corn 350 Powered by Ethanol, his 15th victory in 275 Cup Series races.
This is his second victory and 12th top-10 finish in 2025.
This is his first victory and second top-10 finish in two races at Iowa Speedway.
Chase Briscoe (second) posted his first top-10 finish in two races at Iowa Speedway. It is his 11th top-10 finish in 2025.
Brad Keselowski (third) posted his second top-10 finish in two races at Iowa Speedway.
Riley Herbst (30th) was the highest finishing rookie.
William Byron leads the point standings by 18 points over Chase Elliott
(NASCAR)
Cup Series Playoff Standings after Iowa:
Race 23 of 26 in the regular season
1) #11-Denny Hamlin, 4 wins, 719 [24 playoff points]
2) #5-Kyle Larson, 3 wins, 725 [23 playoff points]
3) #20-Christopher Bell, 3 wins, 684 [17 playoff points]
4) #88-Shane Van Gisbergen, 3 wins, 398 [17 playoff points]
5) #24-William Byron, 2 win, 770 [regular season points leader] [17 playoff points]
6) #9-Chase Elliott, 1 win, 752 [6 playoff points]
7) #12-Ryan Blaney, 1 win, 665 [9 playoff points]
8) #19-Chase Briscoe, 1 win, 640 [6 playoff point]
9) #23-Bubba Wallace, 1 win, 581 [7 playoff points]
10) #22-Joey Logano, 1 win, 560 [7 playoff points]
11) #1-Ross Chastain, 1 win, 544 [6 playoff points]
12) #2-Austin Cindric, 1 win, 481 [8 playoff points]
13) #21-Josh Berry, 1 win, 443 [6 playoff points]
14) #45-Tyler Reddick, 673 [1 playoff point], +122 ahead of 17th
15) #48-Alex Bowman, 614, +63 ahead of 17th
16) #16-Chris Buescher, 574 [-4 playoff points], +23 ahead of 17th
Outside the top 16:
17) #60-Ryan Preece, 551, [2 playoff points], -23 behind 16th
18) #8-Kyle Busch, 501, -73 behind 16th
19) #54-Ty Gibbs, 487, -87 behind 16th
20) #16-A.J. Allmendinger, 456, -118 behind 16th
See the Driver Points Standings and Owner Points Standings.
Race updates:
Checkered flag for Byron. Briscoe finishes second, then Keselowski, Blaney, and Preece.
White flag for Byron.
Lap 349 – Two to go, Byron still in control.
Lap 346 – Five to go. Bryon in control if he has enough fuel. His lead over Briscoe is 1.4 seconds. Keselowski has fallen back to 1.8 seconds behind.
Lap 341 – Ten to go. Byron leads, Briscoe .9 second back, Keselowski 1.6 second back. Blaney, in fourth, is 4.5 seconds off the lead.
Lap 339 – With 12 to go. The lead is steady at .9 second. Byron still saving fuel.
Lap 333 – 18 laps remaining. Byron ahead of Briscoe by .9 second. Keselowski now 1.4 second back.
Lap 328 – Briscoe has fallen to .56 second back of Byron. Byron’s team is telling him to continue saving fuel. Keselowski still about 2 seconds back. Then Preece, Blaney, Bowman, Hocevar, Logano, ADillon and Nemechek
Lap 323 – Keselowski has cut the lead to just under 2 seconds. Briscoe still .24 second behind Byron.
Lap 319 – Keselowski now up to third, but 2.4 seconds back.
Lap 316 – With 35 laps remaining, Briscoe is .28 second behind Byron.
Lap 309 – Keselowski has moved to fourth, but is currently 2.3 seconds out of the lead.
Lap 301 – Fifty laps remaining. Byron, Briscoe, Preece, Bowman, Keselowski the top 5.
Lap 297 – Byron’s lead is now .8 second over Briscoe. Third place Preece is 1.6 seconds back.
Lap 292 – Byron still leads, Briscoe up to second, then Preece, Bowman and Keselowski.
Lap 287 – Green with 64 laps remaining. Byron, Bowman, Briscoe, Keselowski, Nemechek, Preece, Hocevar, Hamlin, Haley, and Blaney the top 10.
Lap 284 – Elliott, Berry, Busch, Buescher, Custer, Jones among those that pit this time. Byron remains the leader as his team becomes more confident they can make it on fuel with all the caution laps.
Lap 282 – CAUTION for debris. It’s the side window from Gilliland’s car.
Lap 278 – Byron retakes the lead over Elliott. His team now thinks he is close on fuel.
Lap 277 – Green with 74 laps to go. Elliott, Byron, Bowman, Berry, Nemechek, Briscoe, Keselowski, Hocevar, Preece, Haley the top 10.
Lap 271- Another CAUTION. This one for a spin by Ty Dillon on the frontstretch.
Lap 269 – Green flag. Elliott Berry and Byron up front. They can’t make it on fuel. Briscoe is 4th and can make it on fuel. Nemechek is 6th and short. Keselowski is 7th and good.
Lap 266 – Larson and Cindric among those that pit under caution. Elliott is now the leader.
Lap 263- CAUTION for SVG spinning on the frontstretch.
Lap 261 – Green flag with 90 laps left. Cindric, Elliott, Berry, Byron, Nemechek, Briscoe, Bowman, Keselowski, Haley, Preece the top 10.
Lap 257 – ADillon, Chastain, Larson, among those that pit this time.
Lap 253 – CAUTION out again. Reddick and Bell spin in turn 2.
Lap 250- Green flag with 101 laps remaining: Cindric, Berry, Elliott, ADillon, Byron, Larson, Bell, Nemechek, Chastain, Reddick are the top 10. They all need to pit before the end,
Lap 246 – Blaney, Gibbs, Preece, and a handful of others pit. Cindric is now the leader.
Lap 243 – CAUTION for a spin by Jones on the frontstretch.
Lap 236 – Green flag. Blaney, Cindric, Berry, Gibbs, Preece, Elliott, ADillon, Larson,Suarez, Byron the top 10. Keselowski restart 24th.
Lap 231 – Pit road is open. Keselowski comes to pit road, along with Busch, Custer, Gilliland and Hocevar. Blaney now the leader.
Lap 229 – CAUTION right back out. Smith spins in turn 2 after contact from Hocevar and backs into the outside wall.
Lap 228 – Back to green. Keselowski still leads Blaney.
Lap 225 – Pit road is open but the leaders continue to stay out. They are just outside the pit window.
Lap 222 – CAUTION out for a spin by Hamlin. He does not hit anything.
Lap 220 – Green flag for thee start of the second stage. 131 laps remaining. Keselowski, Blaney, Cindric, Gibbs, Busch, Berry, Jones, Preece, ADillon, Larson the top 10.
Lap 214 – Pit road is open. Most of the field stays out. Everyone will need to be on pit road once more for fuel.
Lap 211 – CAUTION for the end of stage 2. Keselowski wins it. He’s followed by Blaney, Cindric, Gibbs, Busch, Berry, Bowman, Jones, Preece, ADillon. Hocevar spun in turn 2 but continued on.
Lap 209 – Green flag with two laps remaining in stage 2. Keselowski leads.
Lap 206 – Pit road is open. Quickie yellow. The top 5 stay out. Many others come to pit road and will stay out at the stage break.
Lap 204 – CAUTION out for TDillon in turn 2 after contact from Gilliland.
Lap 201 – Ten laps left in stage 2. Keselowski leads Blaney, Cindric, Gibbs, and Berry. Keselowski’s lead is more than 2 seconds.
Lap 189 – Keselowski takes the lead again.
Lap 186 – Back to green. Blaney leads Keselowski, Cindric, Gibbs, and Berry.
Lap 183 – Pit road is open. Leaders stay out. Most of the drivers that took the wave around come in.
Lap 180 – CAUTION back out. for Ware spinning on the frontstretch.
Lap 177 – Back to green with 34 laps remaining in stage 2. Blaney leads Keselowski, Cindric, Gibbs, Berry, Hamlin, Reddick, Jones, Suarez, Custer. Nineteen drivers took the wave around. 27 drivers are on the lead lap.
Lap 173 – Pit road is open. Those that had not pitted are in. Off pit road: Blaney, Keselowski, Cindric, Gibbs, Berry, Hamlin, Reddick, Jones, Suarez.
Lap 170 – CAUTION is out for SVG. He spins in turn 2. Byron, in 15th, will be the free pass. Keselowski still leads.
Lap 158 – Elliott pits.
Lap 156 – Keselowski takes the lead as Briscoe pits.
Lap 155 – Larson and Hocevar pit.
Lap 146 – Byron comes to pit road.
Lap 140 – Briscoe, Keselowski, Blaney, Larson, Byron, Hocevar, Cindric, ADillon, Elliott, Bell are the top 10. Wallace comes to pit road to split the stage. Everyone needs to pit during this stage.
Lap 132 – Keselowski moves around Blaney for second.
Lap 115 – Byron reporting a possible issue developing with the brakes.
Lap 111 – Briscoe and Blaney still out front. Keselowski has moved back to third, 1.3 seconds back.
Lap 97 – Briscoe continues to lead. Blaney is .17 seconds back. Third place Byron is 1.4 second back.
Lap 80 – Back to green for the start of the second stage.
Lap 74 – Pit road is open and leaders come in . Off pit road: Briscoe, Byron, Blaney, Keselowski, Cindric, Larson, Allmendinger, Hocevar.
Lap 71 – CAUTION is out for the end of stage 1. Keselowski wins it. He’s followed by Cindric, Byron, Blaney, Briscoe, Larson, Hocevar, Elliott, Allmendinger, Haley. The free pass is Busch.
Lap 69 – Keselowski passes Byron for the lead.
Lap 64 – Seven laps remaining in stage 1. Still Byron, Keselowski, Cindric, Briscoe, and Blaney.
Lap 58 – Busch loses a lap. He’s running 33rd.
Lap 51 – Byron still leads but Keselowski, Cindric and Briscoe are all less than a second behind as they work through lap traffic.
Lap 43 – Keselowski is battling Byron for the lead.
Lap 36 – Halfway through the first stage. Byron continues to lead over Keselowski, Cindric, Briscoe, Larson, Blaney, Hocevar, Elliott, Allmendinger, Hamlin.
Lap 31 – Keselowski now up to second behind Byron.
Lap 16 – With 15 laps complete, Byron leads Cindric by .5 second. Keselowski is third, then Briscoe and Larson.
Lap 6 – Briscoe has fallen to fourth.
Lap 2 – Bryon leads the first lap.
• 3:38pm/et – Green flag at Iowa Speedway.
• 3:28pm/et – Engines are fired.
• 3:20pm/et – Pre-race ceremonies are underway.
• 3:00pm/et – USA now has TV coverage for their first race of the season.
• 2:40pm/et – Gragson will also have to drop to the rear for unapproved adjustments.
• So far, Kyle Busch appears to be the only driver dropping to the rear for today’s race.
• No weather issues today. The National Weather Service says: Mostly sunny, with a high near 77. Southeast wind 5 to 8 mph.
Race details:
Broadcast: USA, MRN, and SiriusXM NASCAR Radio
Distance: 350 laps / 306.25 miles
Stages: 70 / 210 / 350
Average time of race: 2:58:37
Pit road speed: 40 mph
Caution car speed: 45 mph
Fuel Window: 110 laps
Timing (all times local & subject to change)
Invocation: 2:20:20 p.m.
National Anthem: 2:21:00 p.m.
Command: 2:28:00 p.m.
Green Flag: 2:35:00 p.m.
Paint Schemes
Cars to the rear: #18-Kyle Busch (backup car), #4-Noah Gragson (unapproved adjustments)
Pit Stall Selections: The selections of pit stalls for the Iowa Corn 350 NASCAR Cup Series race at Iowa Speedway have been made.
Pole winner #19-Chase Briscoe chose pit stall 1.
Outside pole sitter #24-William Byron took the 11th stall, with an opening in front of it.
See all pit choices on the Iowa Pit Stall page.
#19-Chase Briscoe won the Busch pole for the Iowa Corn 350 NASCAR Cup Series race at Iowa Speedway with a speed of 136.933mph for his sixth pole of the year, first at Iowa and eighth of his career.
#24-William Byron will start second followed by #5-Kyle Larson, #2-Austin Cindric, #6-Brad Keselowski, #12-Ryan Blaney, #77-Carson Hocevar, #9-Chase Elliott, #16-AJ Allmendinger, and #7-Justin Haley.
See the complete qualifying results and the Iowa Corn 350 Starting Lineup.
Iowa Speedway – Qualifying Fast Facts:
Chase Briscoe won the Pole Award for the Iowa Corn 350 Powered by Ethanol with a lap of 23.004 seconds, 136.933 mph.
This is his eighth pole in 167 NASCAR Cup Series races.
This is his sixth pole of 2025.
This is his first pole in two races at Iowa Speedway.
William Byron (second)- fourth front-row start of 2025, started top-four in both Iowa races.
Kyle Larson (third)- best start of 2025 since he was second in the Coke 600 in May, started top-three in both Iowa races.
Shane Van Gisbergen (21st) was the fastest qualifying rookie.
(NASCAR)
Qualifying Order
Inspection: The #66-Joey Gase failed inspection twice. Car chief Dylan Roberts has been ejected for the remainder of this event. The No. 66 will also lose pit selection for this event.
Practice for the Iowa Corn 350 NASCAR Cup Series race at Iowa Speedway is over. The results:
#20-Christopher Bell 133.980
#23-Bubba Wallace 133.894
#19-Chase Briscoe 133.781
#24-William Byron 133.752
#5-Kyle Larson 133.678
Slowest: #66-Joey Gase 125.483
Most laps run: #9-Chase Elliott, 51
Best 10 consecutive lap avg (of 24 drivers): #24-William Byron, 133.211mph.
Notes: #8-Kyle Busch moved to a back-up after a hard hit into the outside wall. #11-Denny Hamlin scraped the wall with the right side but only suffered minor cosmetic damage.
See the fastest speeds, best 10 consecutive lap average, laps run on the Iowa Corn 350 Practice speeds page.
Crew Rosters
The entry list for the Iowa Corn 350 NASCAR Cup Series race at Iowa Speedway is posted, 37 teams/drivers [for 40 spots] are listed.
Joey Gase is listed in the #66 this week.
See the full entry list on the Iowa Corn 350 Entry List page.
Goodyear Fast Facts — Iowa: The June 3-4 Goodyear tire test at Iowa Speedway provided valuable data from all three of NASCAR Cup Series’ OE manufacturers: Kyle Busch (Chevrolet), Austin Cindric (Ford) and Chase Briscoe (Toyota). As such, Goodyear will bring new left and right side tires for the 0.875-mile lap.
NASCAR Cup Series News & Notes — Iowa:
- This weekend marks the second running of a NASCAR Cup Series race at Iowa Speedway (2024-2025).
- There are four races left in the NCS regular season: Iowa, Watkins Glen, Richmond and Daytona.
- Chase Elliott leads the regular season point standings by four points over William Byron; Chase Elliott won the 2022 Regular Season Championship.
- The top four in the regular season points standings are separated by 20 points, the closest after 22 races since 2012 (17 points).
- A Hendrick Motorsports driver led the regular season point standings following each of the last 20 races (Ryan Blaney led the points following the first two race of the year).
- Read much more
Statistical Advance: Analyzing the Iowa Corn 350: A look at some of the top statistical performers at Iowa Speedway in Newton, Iowa, going into the Iowa Corn 350 Powered by Ethanol this Sunday.
Race rules and information:
