Saturday night at Kansas Speedway, William Byron drives the No. 88 for JR Motorsports.
Sunday afternoon at Kansas Speedway, William Byron drives the No. 24 for Hendrick Motorsports.
Same track. Two cars. Two teams. And back home in North Carolina, the shops that prepared both of them sit thirty miles apart on either end of I-77 — JR Motorsports in Mooresville, Hendrick Motorsports in Concord. The road between those two buildings is the road Byron took to get here.
Folks, this is a Charlotte story disguised as a Kansas weekend.
Before the 24, There Was the 9
Before Byron was a twenty-eight-year-old Cup star with sixteen victories and back-to-back Daytona 500 trophies on the mantle, he was a JR Motorsports project. Dale Earnhardt Jr.'s Mooresville operation took a teenager who'd been tearing up iRacing simulators and Legends cars and put him in the No. 9 Chevrolet for the 2017 NASCAR Xfinity Series season. His ROOKIE season. Four wins — Iowa, Daytona, Indianapolis, Phoenix. Twelve top-fives. Twenty-two top-tens. A 10.4 average finish. And the series championship.
Let me tell you something — that doesn't happen. Rookies don't walk into the second-highest level of American stock car racing and win the whole thing. Byron did it at nineteen years old.
Hendrick Motorsports noticed. Of course they noticed — the two organizations share a technical alliance that makes the thirty miles between Mooresville and Concord feel like a hallway. In August of 2017, before Byron had even clinched the title, Hendrick announced he'd be moving to the Cup Series full-time in 2018.
Seven years later, he's won sixteen Cup races, two Daytona 500s in a row, and made the Championship 4 three consecutive seasons. The kid from Charlotte became the franchise.
Saturday Is Assignment Two of Three
Saturday's Kansas Lottery 300 is Byron's second JR Motorsports guest start of 2026. He ran Phoenix back in March — started sixth, finished thirteenth in the No. 88. Not the headline-grabbing return, but the speed was there. Kansas is a different animal entirely. A mile-and-a-half oval with progressive banking and multiple grooves that reward a driver who can feel the grip falling away three laps before anyone else does. Byron's done well here before — he won a Craftsman Truck Series race at Kansas in May 2016, and his last O'Reilly Series start at the track was 2017, when he finished fourth.
"Kansas is a really fun track with a lot of lanes as the race goes on," Byron said this week. "You're always searching for grip and balance. It fits my style well, and we've had good speed there before."
Pocono is the last scheduled guest start. Three total this year. Just enough to remind everyone where he came from.
The Team That Doesn't Need Saving
JR Motorsports doesn't need William Byron to win races. They're doing that just fine on their own.
Six of the last seven O'Reilly Series races — SIX OF SEVEN — belong to the Mooresville operation. At Bristol two weeks ago, JRM put four cars in the top five — the kind of result that doesn't happen to teams that are guessing. Justin Allgaier is running away with the championship: 470 points, a 130-point cushion, thirty-one career wins that tie him with Jack Ingram for sixth on the all-time list. Carson Kvapil, Sammy Smith, and Conner Jones have all found victory lane this season. The organization is averaging a 9.4 finish across four full-time cars through nine races.
Byron's thirteenth at Phoenix starts to make more sense in this context — a Cup champion climbing into a car tuned to a different aerodynamic package, surrounded by teammates who've been racing in it every weekend for two months. Saturday is race two. The learning curve gets shorter.
And the setting gets bigger. Kansas will be only the second night race in O'Reilly Series history at the track. Two hundred laps under the lights. A $1.75 million purse. Thirty-seven cars on the entry list, and four of them carry the JR Motorsports banner.
Then Sunday, for the AdventHealth 400, a Cup field of thirty-seven rolls into the same garage. Byron will be in the No. 24 by then. Same paddock. Different paycheck. Same driver walking from one team's stall to the next.
The Mooresville Factory
This is what JR Motorsports does, folks. They build Cup drivers.
Byron. Chase Elliott, who drove the No. 9 at JRM before winning the 2020 Cup championship at Hendrick. Noah Gragson. The program in Mooresville is a finishing school — raw talent goes in, polished stock car racers come out, and the team down I-77 in Concord gets first dibs.
When Byron climbs into the 88 Saturday, it's not nostalgia. It's a return address. Dale Jr. built something in that Mooresville shop that keeps producing, year after year, and every guest start by a Cup regular stamps the same message: the road to Hendrick Motorsports runs through JR Motorsports.
Charlotte built this kid. Saturday night, he comes home — even if home is twelve hundred miles away in Kansas City.
The Details
The Kansas Lottery 300 goes green Saturday, April 18 at 7 p.m. Eastern on The CW. The AdventHealth 400 follows Sunday afternoon. Follow The Charlotte Mercury for the recap of both — because when William Byron takes the green flag in an 88 car, this town pays attention.
Update, April 29: The same JR Motorsports No. 88 Byron drove at Kansas goes to Kyle Larson at Texas this Saturday, with Connor Zilisch back in the JRM No. 1 for his first career Texas start. Read the Texas preview.