The 2018 Roseanne 300 was the 5th stock car race of the 2018 NASCAR Xfinity Series season, and the 20th iteration of the event. The race was held on Saturday, March 17, 2018, in Fontana, California, at Auto Club Speedway, a 2 miles (3.2 km) permanent D-shaped oval racetrack. The race took the scheduled 150 laps to complete. At race's end, Joey Logano of Team Penske would dominate and win his 29th NASCAR Xfinity Series win of his career and the first of his part-time season. To fill out the podium, Justin Allgaier and Elliott Sadler, both driving for JR Motorsports would finish second and third, respectively.
The 2018 Alsco 300 was the 11th stock car race of the 2018 NASCAR Xfinity Series season and the 37th iteration of the event. The race was held on Saturday, May 26, 2018, in Concord, North Carolina at Charlotte Motor Speedway, a 1.5 miles permanent quad-oval. The race was extended from 200 laps to 204 due to a NASCAR overtime finish. At race's end, Brad Keselowski of Team Penske would win the race under caution, as Tyler Reddick and Ty Majeski would both wreck on the backstretch on the final lap, putting out a caution. The win was Keselowski's 38th career NASCAR Xfinity Series win and his second of the season. To fill out the podium, Cole Custer of Stewart-Haas Racing with Biagi-DenBeste and Christopher Bell of Joe Gibbs Racing would finish second and third, respectively.
The 2018 OneMain Financial 200 was the 10th stock car race of the 2018 NASCAR Xfinity Series season and the 37th iteration of the event. The race was held on Saturday, May 5, 2018, in Dover, Delaware at Dover International Speedway, a 1 mile oval-shaped permanent racetrack. The race took the scheduled 200 laps to complete. At race's end, Justin Allgaier of JR Motorsports would hold off his teammate Elliott Sadler in the closing laps to win his sixth career NASCAR Xfinity Series win and his first of the season. Allgaier would also win an extra $100,000 for winning a Dash 4 Cash event. To fill out the podium, Daniel Hemric of Richard Childress Racing would finish third.
The 2018 Sparks Energy 300 was the ninth stock car race of the 2018 NASCAR Xfinity Series season, and the 27th iteration of the event. The race was held on Saturday, April 28, 2018, in Lincoln, Alabama at Talladega Superspeedway, a 2.66 miles permanent triangle-shaped superspeedway. The race was extended from the scheduled 113 laps to 115 due to a NASCAR overtime finish. At race's end, Spencer Gallagher of GMS Racing would make a last lap pass on Tyler Reddick and fend off the field to win a shocker, winning his first and so far final NASCAR Xfinity Series win of his career and his first and only win of the season. To fill out the podium, Brandon Jones of Joe Gibbs Racing and Justin Allgaier of JR Motorsports would finish second and third, respectively.
The 2018 Fitzgerald Glider Kits 300 was the seventh stock car race of the 2018 NASCAR Xfinity Series season, and the 36th iteration of the event. The race was held Saturday, April 14, 2018, in Bristol, Tennessee at Bristol Motor Speedway, a 0.533 miles (0.858 km) permanent oval-shaped racetrack. The race took the scheduled 300 laps to complete. At race's end, Ryan Preece of Joe Gibbs Racing would take the lead on the final restart with 10 laps to go and win his second and to date, final career NASCAR Xfinity Series win and his first and only win of the season. To fill out the podium, Justin Allgaier of JR Motorsports and Daniel Hemric of Richard Childress Racing would finish second and third, respectively.
The 2018 Alsco 300 was the 17th stock car race of the 2018 NASCAR Xfinity Series season and the 18th iteration of the event. The race was held on Friday, July 13, 2018, in Sparta, Kentucky, at Kentucky Speedway, a 1.5-mile tri-oval speedway. The race took the scheduled 200 laps to complete. At race's end, Christopher Bell of Joe Gibbs Racing would come back from a spin early in the race to win his third career NASCAR Xfinity Series win and his second of the season. To fill out the podium, Daniel Hemric of Richard Childress Racing and Kyle Busch of Joe Gibbs Racing would finish second and third, respectively.
The 2018 Iowa 250 presented by Enogen was the 14th stock car race of the 2018 NASCAR Xfinity Series season and the 8th iteration of the event. The race was held on Sunday, June 17, 2018, in Newton, Iowa at Iowa Speedway, a 7⁄8 mile (1.4 km) permanent D-shaped oval racetrack. The race took the scheduled 250 laps to complete. At race's end, JR Motorsports driver Justin Allgaier would dominate the race to win his seventh career NASCAR Xfinity Series win and his second of the season. To fill out the podium, Christopher Bell of Joe Gibbs Racing and Daniel Hemric of Richard Childress Racing would finish second and third, respectively.
The 2018 Kansas Lottery 300 was the 30th stock car race of the 2018 NASCAR Xfinity Series season, the first race in the Round of 12, and the 18th iteration of the event. The race was held on Saturday, October 20, 2018, in Kansas City, Kansas at Kansas Speedway, a 1.500 miles permanent paved oval-shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, John Hunter Nemechek of Chip Ganassi Racing would take advantage of a late-race restart and pass eventual second-place driver Richard Childress Racing driver Daniel Hemric to win his first career NASCAR Xfinity Series win and his first and only win of the season. To fill out the podium, Elliott Sadler of JR Motorsports would finish third.
The 2018 O'Reilly Auto Parts Challenge was the 31st stock car race of the 2018 NASCAR Xfinity Series season, the second race in the Round of 12, and the 18th iteration of the event. The race was held on Saturday, November 3, 2018, in Fort Worth, Texas at Texas Motor Speedway, a 1.5 miles permanent tri-oval shaped racetrack. The race took the scheduled 200 laps to complete. A wild finish would see Cole Custer of Stewart-Haas Racing with Biagi-DenBeste best JR Motorsports driver Tyler Reddick with a last-lap pass on the backstretch to win his second career NASCAR Xfinity Series race, his first and only win of the season, and a guaranteed spot in the Championship 4. To fill out the podium, Austin Cindric of Team Penske would finish third.
The 2018 EcoBoost 300 was the 33rd and final stock car race of the 2018 NASCAR Xfinity Series season, the championship race of that year, and the 24th iteration of the event. The race was held on Saturday, November 17, 2018, in Homestead, Florida at Homestead–Miami Speedway, a 1.5 miles (2.4 km) permanent oval-shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, JR Motorsports driver Tyler Reddick would take the lead after cunning pit strategy late in the race to win his first career NASCAR Xfinity Series championship, his 3rd win of his career in the series, and his second and final win of the season.
The 2017 Rinnai 250 was the second stock car race of the 2017 NASCAR Xfinity Series season, and the 26th iteration of the event. The race was held on Saturday, March 4, 2017, in Hampton, Georgia at Atlanta Motor Speedway, a 1.54 miles (2.48 km) permanent asphalt quad-oval intermediate speedway. The race took the scheduled 163 laps to complete. At race's end, Kyle Busch, driving for Joe Gibbs Racing, would pull away with the lead at the end of the race to win his 87th career NASCAR Xfinity Series win and his first of the season. To fill out the podium, Brad Keselowski of Team Penske and Kyle Larson of Chip Ganassi Racing would finish second and third, respectively.
The 2017 My Bariatric Solutions 300 was the sixth stock car race of the 2017 NASCAR Xfinity Series season and the 21st iteration of the event. The race was held on Saturday, April 8, 2017, in Fort Worth, Texas, at Texas Motor Speedway, a 1.5 miles permanent tri-oval shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, Erik Jones, driving for Joe Gibbs Racing, would dominate the race to win his seventh career NASCAR Xfinity Series win and his first of the season. To fill out the podium, Ryan Blaney of Team Penske and Kevin Harvick of Stewart-Haas Racing would finish second and third, respectively.
The 2017 Sparks Energy 300 was the ninth stock car race of the 2017 NASCAR Xfinity Series season and the 26th iteration of the event. The race was held on Saturday, May 6, 2017, in Lincoln, Alabama at Talladega Superspeedway, a 2.66 miles permanent triangle-shaped superspeedway. The race took the scheduled 113 laps to complete. At race's end, Aric Almirola, driving for Biagi-DenBeste Racing, would take the lead with four to go and defend fiercely to win his third and to date, final career NASCAR Xfinity Series win and his only win of the season. To fill out the podium, Elliott Sadler of JR Motorsports and Joey Logano of Team Penske would finish second and third, respectively.
The 2017 Hisense 4K TV 300 was the 10th stock car race of the 2017 NASCAR Xfinity Series season and the 36th iteration of the event. The race was held on Saturday, May 27, 2017, in Concord, North Carolina at Charlotte Motor Speedway, a 1.5 miles permanent quad-oval. The race took the scheduled 200 laps to complete. At race's end, Ryan Blaney, driving for Team Penske, would climb his way to the lead on the final restart with three to go to win his fifth career NASCAR Xfinity Series win and his first win of the season. To fill out the podium, Kevin Harvick of Stewart-Haas Racing and Austin Dillon of Richard Childress Racing would finish second and third, respectively.
The 2017 U.S. Cellular 250 was the 19th stock car race of the 2017 NASCAR Xfinity Series season and the ninth iteration of the event. The race was held on Saturday, July 29, 2017, in Newton, Iowa, at Iowa Speedway, a 0.875 miles permanent D-shaped low-banked racetrack. The race was extended from 150 laps to 154 laps, due to a NASCAR overtime finish. Ryan Preece, driving for Joe Gibbs Racing, held off Kyle Benjamin in a close finish for his first career NASCAR Xfinity Series win. Preece would beat Benjamin by 0.054 of a second. To fill out the podium, Brian Scott of Richard Childress Racing would finish third, respectively.
The 2017 TheHouse.com 300 was the 26th stock car race of the 2017 NASCAR Xfinity Series season, the final race of the regular season, and the 17th iteration of the event. The race was held on Saturday, September 16, 2017, in Joliet, Illinois, at Chicagoland Speedway, a 1.5 miles (2.41 km) tri-oval speedway. The race took the scheduled 200 laps to complete. At race's end, Justin Allgaier, driving for JR Motorsports, would manage to pull away from the field on the final restart with seven to go to win his fifth career NASCAR Xfinity Series victory and his second and final win of the season. To fill out the podium, Kyle Larson, driving for Chip Ganassi Racing, and Elliott Sadler, driving for JR Motorsports, would finish second and third, respectively.
The 2017 Kansas Lottery 300 was the 30th stock car race of the 2017 NASCAR Xfinity Series season, the first race of the Round of 8, and the 17th iteration of the event. The race was held on Saturday, October 21, 2017, in Kansas City, Kansas at Kansas Speedway, a 1.500 miles permanent paved oval-shaped racetrack. The race took the scheduled 200 laps to complete. In a wild finish, Christopher Bell, driving for Joe Gibbs Racing, would manage to defend against the dominant Erik Jones to win his first career NASCAR Xfinity Series victory and his only victory of the season. To fill out the podium, Tyler Reddick, driving for Chip Ganassi Racing, and Ryan Blaney, driving for Team Penske, would finish second and third, respectively.
The 2017 O'Reilly Auto Parts 300 was the 31st stock car race of the 2017 NASCAR Xfinity Series season, the second race of the Round of 8, and the 13th iteration of the event. The race was held on Saturday, November 4, 2017, in Fort Worth, Texas, at Texas Motor Speedway, a 1.5 miles permanent tri-oval shaped racetrack. The race took the scheduled 200 laps to complete. At race's end, Erik Jones, driving for Joe Gibbs Racing, would dominate the race to win his ninth career NASCAR Xfinity Series victory and his third and final victory of the season. To fill out the podium, Ryan Blaney, driving for Team Penske, and Kyle Larson, driving for Chip Ganassi Racing, would finish second and third, respectively.
The 2017 Ticket Galaxy 200 was the 32nd stock car race of the 2017 NASCAR Xfinity Series season, the third and elimination race of the Round of 8, and the 19th iteration of the event. The race was held on Saturday, November 11, 2017, in Avondale, Arizona at Phoenix International Raceway, a 1-mile (1.6 km) permanent low-banked tri-oval race track. The race took the scheduled 200 laps to complete. On the final restart with 17 to go, with the help of his pit crew, William Byron, driving for JR Motorsports, would manage to pull away from the field to win his fourth and to date, final career NASCAR Xfinity Series victory, his fourth and final win of the season, and a guaranteed spot in the Championship 4. To fill out the podium, Ryan Blaney, driving for Team Penske, and Erik Jones, driving for Joe Gibbs Racing, would finish second and third, respectively.
The 2017 Ford EcoBoost 300 was the 33rd and final stock car race of the 2017 NASCAR Xfinity Series season, the Championship 4 race, and the 23rd iteration of the event. The race was held on Saturday, November 18, 2017, in Homestead, Florida at Homestead–Miami Speedway, a 1.5 miles (2.4 km) permanent oval-shaped racetrack. The race took the scheduled 134 laps to complete. At race's end, Cole Custer, driving for Stewart-Haas Racing, would dominate the race to take his first career NASCAR Xfinity Series victory and his only victory of the season.
