A large field of World of Outlaws NOS Energy Drink Sprint Car Series entries will converge on Knoxville Raceway in Knoxville, Iowa, on June 12–13 for the final leg of the Premier Chevy Dealers Clash — the last official tune-up before the 65th NOS Energy Drink Knoxville Nationals presented by Casey’s (Aug. 12–15).

Organizers expect one of the year’s toughest fields as regional and local contenders mix with national talent and World of Outlaws tour regulars. That depth should produce intense heat races and high-stakes battles for position and pride, and the weekend will serve as a key barometer of form and a final opportunity for many teams to fine-tune cars and strategies. The turnout underscores Knoxville Raceway’s continued role as a central venue on the sprint car calendar.

Sheldon Haudenschild turned an emotional personal loss into a comeback victory at the World of Outlaws NOS Energy Drink Sprint Car feature at Plymouth Dirt Track in Plymouth, Wisconsin. Haudenschild learned his dog, Pella, had died the morning of the race, and he broke a 21-race winless streak with a win that was his second of the season and the 48th of his career. The triumph produced a visibly emotional response from Haudenschild.

Haudenschild rallied from as low as eighth during the 35-lap feature, charging forward to pass Michael “Buddy” Kofoid with five laps remaining to take the lead. The decisive stretch came during a seven-lap shootout that followed after David Gravel clipped a rut in Turn 4, slammed the Big Game Motorsports No. 2 into the wall and suffered severe rear-end damage that ended his night. Kofoid finished second for his 11th podium of the season. Garet Williamson scored his best result of the year in third and extended his streak to four straight top-10s. Cole Macedo finished fourth and Carson Macedo was fifth, with the race run before a record crowd at Plymouth Dirt Track.

Kasey Jedrzejek earned his first World of Outlaws podium at River Cities Speedway in Grand Forks, N.D., a milestone the 21-year-old rookie from Lagrange, Ohio called “a very solid night” and one that gave him momentum heading into the nearly $1 million Summer of Money stretch.

Jedrzejek started the 40-lap Feature on the pole in Bill Rose Racing’s No. 6 car and led much of the race before losing the lead on a Lap 15 restart to two-time defending series champion David Gravel. He held on for third and said he watched the race replay repeatedly as he reflected on the performance. The finish matched team owner Bill Rose’s first Outlaws podium at River Cities in 2011, when Rose also started first and finished third. Jedrzejek had only six Outlaws Feature starts before going full time.

With that momentum, Jedrzejek said he is turning his focus to a busy summer that includes Huset’s High Bank, the Kings Royal at Eldora and the Knoxville Nationals. His rookie campaign continues with a three-track tripleheader that runs June 5–7 at Hartford, Plymouth and Angell Park as he aims to build on the performance.

Nick Hoffman won the Blaster 57 Special at Mansfield and claimed a boosted six-figure $100,057 winner’s check after local philanthropists Dan and Brenda Niss increased the top prize mid-program, track owner Matt Tifft announced. The Nisses had boosted Friday’s payout to $100,000 for Tyler Erb the night before. The event was part of the World of Outlaws Late Model Series presented by DIRTVision.

Hoffman earned the Simpson Quick Time Award in qualifying after rebounding from struggles on Friday, and he won his heat to start the Feature on the front row outside Bilstein Pole winner Garrett Alberson. Hoffman slipped to fourth early as Josh Rice moved through, executed a three-wide pass to regain position, and seized the lead with 11 laps remaining when Alberson hit a bump in Turn 2 and lost momentum. Hoffman rallied to prevail in the Feature.

The victory was Hoffman’s 17th World of Outlaws win and the largest payday of his career. The weekend’s total purse topped $240,000, the winner’s share had originally been $57,000, and the Feature paid $5,700 just to start. Garrett Alberson finished second, Hudson O’Neal third, Tyler Erb fourth, and Brandon Sheppard fifth.

Carson Macedo charged from ninth and dove under David Gravel with four laps remaining to win the 40-lap World of Outlaws feature at River Cities Speedway. He made the pass down the front straightaway in the first leg of the Northern Tour Don Mack Classic; Gravel countered with a slide job through Turns 3 and 4, but Macedo cleared him on the following circuit and pulled away to the checkered flag.

Gravel finished second for his series-best 14th podium this season, while rookie Kasey Jedrzejek (Bill Rose Racing No. 6) scored his first career World of Outlaws podium in third. Chris Windom was fourth and Sheldon Haudenschild fifth.

The victory moved Macedo into sole possession of second in the standings, cutting the gap to series leader David Gravel to 114 points and tightening the championship picture.

It was Macedo’s 61st career World of Outlaws win and his third at River Cities Speedway, tying him with Craig Dollansky for the second-most wins at the quarter-mile facility. The result was Jason Johnson Racing’s third win of the season.

Tyler Erb won the World of Outlaws Late Model feature at Mansfield Speedway and collected a surprise $100,000 winner’s prize after local philanthropists the Niss family boosted the advertised purse from $12,000 to $100,000 moments before the race. The six-figure payout was Erb’s first and elevated the one-off 57 Special Opener on the World of Outlaws Late Model Series calendar.

The payday came a day after Erb and his girlfriend, Emma Hodge, announced they were expecting their first child.

Erb started second, passed pole-sitter Ricky Thornton Jr. on the opening lap and led all 40 laps, fending off a late charge from Brandon Overton to win by roughly half a second. Thornton later fell out of contention with a flat tire. Bobby Pierce rallied from 10th to finish third, while Josh Rice was fourth and Hudson O’Neal fifth. The victory added to Erb’s résumé — five World of Outlaws wins, a World of Outlaws series championship, and 21 DIRTcar Summer Nationals victories, including the Gateway Dirt Nationals and the National 100. Erb, of New Waverly, Texas, quipped that after taking the lead on lap one he wound up with a $100,000 payday.

Ricky Thornton Jr. won the Lonewolf 40 at Wayne County Speedway in Orrville, Ohio, capturing his sixth World of Outlaws Late Model Series victory and his first Series win since the 2024 World Finals. Thornton started from the Bilstein Pole in his first World of Outlaws start at Wayne County and led the 40-lap feature to the checkered, surviving a chaotic three-wide opening sequence.

A final restart with two laps remaining tightened the contest, and Thornton held off late charges from Nick Hoffman and Bobby Pierce to secure the victory. Hoffman finished second, Pierce — who charged from a 16th-place start — was third, Tyler Erb fourth and Dustin Sorensen fifth, marking Sorensen’s second straight top-five.

Early incidents produced flat tires for Hudson O’Neal and Brandon Sheppard. The win ended a difficult stretch for Thornton: after opening May with a victory at Circle City Raceway, he had two top-five finishes and four results of 18th or worse across seven subsequent starts. The Lonewolf 40 was also Thornton’s third win in his first 40 Late Model starts this season.

The World of Outlaws North Dakota swing will open Friday, May 29 at Grand Forks’ River Cities Speedway and will continue after an off day at Minot’s Nodak Speedway. The two-race stretch will serve as an early-season test in the championship battle.

David Gravel tops the standings as he pursues a third straight series title, holding a 118-point lead and a 4.96 average finish this season. Michael “Buddy” Kofoid has the most wins this season, with six, and he is tied with Carson Macedo for second in the standings.

River Cities will host the World of Outlaws for the 36th time since 2007, and Nodak returns to the schedule after an eight-year absence; Nodak previously hosted 13 World of Outlaws events.

Donny Schatz, a Fargo native and 10-time series champion, has an extensive River Cities résumé: 12 wins in 35 starts, 24 podiums, 31 top-five finishes and a 2.94 average finish. He also owns five straight Nodak victories dating to 2012. Gravel is one of only two full-time drivers with wins at both River Cities and Nodak.

Kofoid’s recent form includes a River Cities sweep in 2025 and a dramatic charge from seventh to victory at Huset’s this season. Sheldon Haudenschild, now with KCP Racing, has shown speed at River Cities—he has led seven Features there—but remains winless at the track despite multiple podiums and several lost opportunities. Local NOSA competitors Amelia Eisenschenk, Laela Eisenschenk, Mark Dobmeier and Jade Hastings are also names to watch during the North Dakota swing.

Bobby Pierce successfully defended the Connor Bobik Memorial at Marion Center Raceway, holding off Hudson O’Neal to take the win and the World of Outlaws points lead. It was Pierce’s ninth World of Outlaws victory of the season and the 51st of his career, moving him 17 points clear of Nick Hoffman, who finished 13th.

The event had been postponed and was later run at Marion Center Raceway. Pierce swept around pole-sitter Dustin Sorensen on the opening lap, then traded the lead with O’Neal multiple times. Pierce blocked O’Neal over the closing laps and repelled a last-lap slide attempt to secure the win.

Hudson O’Neal finished second, with Drake Troutman third — a career-best result at his home-state track. Dustin Sorensen recovered to fourth for his first top-five of the season, and Max Blair rounded out the top five.