Cole Custer dominated to win Saturday’s Ford EcoBoost 300 at Homestead-Miami Speedway, earning his first Xfinity Series victory, as William Byron finished third to clinch his first Xfinity championship.
Byron, 19, clinched the championship and the Rookie of the Year award by finishing ahead of teammates Elliott Sadler (eighth) and Justin Allgaier (12th).
Byron passed Sadler for good with six laps to go after the drivers battled closely for the top spot among the Championship 4 contenders for much of the last 50 laps.
“I don’t think I breathed for the last 20 laps, that was incredible,” Byron told NBCSN. “(Sadler) raced me clean. We raced hard for it. I can’t believe this. I just got to thank God for giving me this platform to perform. I can’t believe this. I’m tired.”
Sadler’s chances of getting back by his teammate were ruined when he made contact with the left rear of Ryan Preece soon after he had been passed by Byron. The contact got Preece sideways and caused Sadler to get into the wall.
Damage from the impact cut a tire on Sadler’s No. 1 Chevrolet. After the race, Sadler got into a confrontation with the Joe Gibbs Racing driver on pit road. Sadler finished runner-up in the championship standings for the fourth time in his career.
Byron’s title is the first championship for JR Motorsports since Chase Elliott‘s in 2014.
Daniel Hemric‘s chances at a title disappeared on Lap 61 when he visited pit road for a battery problem. The Richard Childress Racing driver returned to the track 12 laps later. Until he was passed by Byron on Lap 54, he was the highest running championship driver. Hemric finished 34th.
Custer’s victory comes in his 38th series start. The win is also the first Xfinity victory for Stewart-Haas Racing.
The 19-year-old driver led 182 of the 200 laps, a series-high at the track.
“I haven’t done that in a while,” Custer told NBCSN in Victory Lane. “We definitely had something to prove this weekend. We were so close to making (the Championship 4) last weekend. … Our Haas Automation Ford was unreal. We really wanted to have a good showing on Ford Championship weekend, even though we weren’t in it.”
STAGE 1 WINNER: Cole Custer
STAGE 2 WINNER: Cole Custer
MORE: Race results
WHO HAD A GOOD DAY: Sam Hornish Jr. finished second for his third top five in six starts this season … Pole-sitter Tyler Reddick finished fourth in his last start with Chip Ganassi Racing … Ryan Preece finished fifth in his fourth start of the year. He placed in the top five in all four races … Ty Majeski finished 10th in his third start of the year for Roush Fenway Racing. It’s his first top 10.
WHO HAD A BAD DAY: A day after winning the Truck Series title, Christopher Bell finished 36th after losing his engine on Lap 78 … Ryan Reed finished 20th after being issued a penalty on the initial start of the race.
NOTABLE: Sam Hornish Jr.’s runner-up finish helped Team Penske clinch the owner’s championship … William Byron finished his rookie season tied with Erik Jones (2016) for the second most wins by a rookie with four.
QUOTE OF THE NIGHT: “To be honest with you, if there’s a person you don’t want to cost a championship to it’s Elliott Sadler.” – Ryan Preece