What: Irwin Tools Night Race
When/where: Today, practice (Fox Sports 1, noon), qualifying (ESPN2, 5:30 p.m.); Saturday, race (Ch. 28, 7:30 p.m.); Bristol, Tenn.
Fast facts: Tony Stewart, sidelined by a broken leg, has turned over Stewart-Haas Racing's No. 14 Chevrolet to Mark Martin for 12 of the final 13 races. The 54-year-old Martin was released from his part-time driving schedule at Michael Waltrip Racing, with New Hampshire winner Brian Vickers taking over MWR's No. 55 Toyota. At Talladega next month, Austin Dillon will drive the No. 14 and Waltrip will be in the No. 55. … Kasey Kahne won the March race at the track.
Standings: 1. Jimmie Johnson, 813; 2. Clint Bowyer, 772; 3. Carl Edwards, 762; 4. Kevin Harvick, 749; 5. Kyle Busch, 706; 6. Matt Kenseth, 688; 7. Dale Earnhardt Jr., 679; 8. Brad Keselowski, 667; 9. Kurt Busch, 665; 10. Greg Biffle, 663
What: Food City 250
When/where: Today, practice (Fox Sports 1, 9 a.m.), qualifying (Fox Sports 1, 3:30 p.m.), race (ESPN, 7:30 p.m.); Bristol, Tenn.
Fast facts: Sprint Cup driver Kyle Busch has eight Nationwide victories this year to push his series-record total to 59. He won the March race at the track to tie Kevin Harvick's Bristol series victory record of five.
Standings: 1. Sam Hornish, 769; 2. Elliott Sadler, 756; 3. Regan Smith, 754; 4. Austin Dillon, 754; 5. Brian Vickers, 751
What: Grand Prix of Sonoma
When/where: Today, practice; Saturday, practice, qualifying (NBC Sports Network, 9 p.m.); Sunday, race (NBCSN, 4:33 p.m.); Sonoma, Calif.
Fast facts: Will Power won at the track in 2010 and 2011 after breaking his back in 2009 in practice at the circuit. He's winless this year. … American Le Mans Series star Lucas Luhr is making his series debut in a car fielded by Sarah Fisher Hartman Racing in partnership with RW Motorsports.
Standings: 1. Helio Castroneves, 453; 2. Scott Dixon, 422; 3. Ryan Hunter-Reay, 388; 4. Marco Andretti, 377; 5. Simon Pagenaud, 350
What: Belgian Grand Prix
When/where: Today, practice (NBC Sports Network, 8 a.m.); Saturday, practice, qualifying (NBCSN, 12:30-p.m.); Sunday, race (NBCSN, 8 a.m.); Spa-Francorchamps, Belgium
Fast facts: The 4.35-mile course is the longest in the series. … Last year, McLaren's Jenson Button raced to the second of his three victories on the season.
Standings: 1. Sebastian Vettel, 172; 2. Kimi Raikkonen, 134; 3. Fernando Alonso, 133; 4. Lewis Hamilton, 124; 5. Mark Webber, 105
Next: Chevrolet Silverado 250, Sept. 1, Canadian Tire Motorsport Park, Bowmanville, Ontario
Fast facts: Kyle Busch won at Bristol (Tenn.) Motor Speedway on Wednesday night for his record 14th overall victory on the 0.533-mile oval. Busch broke a tie with Darrell Waltrip for the NASCAR track victory record. Busch has four victories at the track in the truck series, five in Sprint Cup and five in Nationwide. The victory was his third in eight truck starts this season and pushed his career total to 33.
Standings: 1. Matt Crafton, 498; 2. James Buescher, 449; 3. Jeb Burton, 445; 4. Ty Dillon, 440; 5. Timothy Peters, 426
Next: U.S. Nationals, Aug. 28-Sept. 2, Lucas Oil Raceway at Indianapolis, Clermont, Ind.
Standings: Top Fuel – 1. Shawn Langdon, 1,370; 2. Spencer Massey, 1,249. Funny Car — 1. Matt Hagan, 1,253; 2. Ron Capps, 1,129. Pro Stock — 1. Mike Edwards, 1,540; 2. Allen Johnson, 1,390. Pro Stock Motorcycle — 1. Hector Arana, 795; 2. Matt Smith, 646