International Speedway Corporation

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FILE - In this July 7, 2001, file photo, Dale Earnhardt, Jr. celebrates his Pepsi 400 win at Daytona International Speedway in Daytona Beach, Fla. Dale Earnhardt Jr. abruptly announced his retirement at the end of the season Tuesday, April 25, 2017, a decision that will cost NASCAR its most popular driver as the series scrambles to rebuild its fan base. (David Tucker/The Daytona Beach News-Journal via AP, File)

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FILE - In this Feb. 16, 2008, file photo, Dale Earnhardt Jr, right, walks past fans looking through a window into his garage during practice for the Daytona 500 NASCAR Sprint Cup Series auto race at Daytona International Speedway in Daytona Beach, Fla. Earnhardt Jr. abruptly announced his retirement at the end of the season Tuesday, April 25, 2017, a decision that will cost NASCAR its most popular driver as the series scrambles to rebuild its fan base. (AP Photo/John Raoux)

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FILE - In this Feb. 17, 2008, file photo, NASCAR fans line up to buy Dale Earnhardt Jr. souvenirs before the Daytona 500 NASCAR Sprint Cup Series auto race at Daytona International Speedway in Daytona Beach, Fla. Earnhardt Jr. abruptly announced his retirement at the end of the season Tuesday, April 25, 2017, a decision that will cost NASCAR its most popular driver as the series scrambles to rebuild its fan base. (AP Photo/Reinhold Matay, File)

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FILE - In this Feb. 23, 2014, file photo, Dale Earnhardt Jr. drives in front of fans in the grandstands waving the checkered flag after winning the Daytona 500 NASCAR Sprint Cup Series auto race at Daytona International Speedway in Daytona Beach, Fla. Earnhardt Jr. abruptly announced his retirement at the end of the season Tuesday, April 25, 2017, a decision that will cost NASCAR its most popular driver as the series scrambles to rebuild its fan base. (AP Photo/John Raoux, File)

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FILE - In this Feb. 24, 2013, file photo, Dale Earnhardt Jr. arrives on pit road prior to the start of the NASCAR Daytona 500 Sprint Cup Series auto race at Daytona International Speedway, in Daytona Beach, Fla. Earnhardt Jr. abruptly announced his retirement at the end of the season Tuesday, April 25, 2017, a decision that will cost NASCAR its most popular driver as the series scrambles to rebuild its fan base. (AP Photo/John Raoux, File)

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FILE - In this Feb. 15, 2004, file photo, Dale Earnhardt, Jr. celebrates with his crew at the start finish line after winning the Daytona 500 auto race at Daytona International Speedway in Daytona Beach, Fla. Dale Earnhardt Jr. abruptly announced his retirement at the end of the season Tuesday, April 25, 2017, a decision that will cost NASCAR its most popular driver as the series scrambles to rebuild its fan base. (Kelly Jordan/The Daytona Beach News-Journal via AP, File)

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In this Feb. 20, 2016, file photo, Dale Earnhardt Jr. looks from the garage before practice at Daytona International Speedway in Daytona Beach, Fla. (AP Photo/Wilfredo Lee, File)

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In this Saturday, Feb. 18, 2017, photo, Danica Patrick works out at Daytona International Speedway, in Daytona Beach, Fla. (AP Photo/John Raoux)

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In this Saturday, Feb. 18, 2017 photo, Associated Press writer Jenna Fryer, left, talks with Danica Patrick after a workout at Daytona International Speedway, in Daytona Beach, Fla. Patrick is really serious about health and clean eating, and as her driving days may be nearing an expiration date, a second career in lifestyle and fitness could be up next. (AP Photo/John Raoux)

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In this Saturday, Feb. 18, 2017, photo, Associated Press writer Jenna Fryer, bottom, gets some workout instruction from Danica Patrick at Daytona International Speedway, in Daytona Beach, Fla. Patrick is really serious about health and clean eating, and as her driving days may be nearing an expiration date, a second career in lifestyle and fitness could be up next. (AP Photo/John Raoux)

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In this Saturday, Feb. 18, 2017 photo, Associated Press writer Jenna Fryer, left, high-fives Danica Patrick after a workout at Daytona International Speedway, in Daytona Beach, Fla. Patrick is really serious about health and clean eating, and as her driving days may be nearing an expiration date, a second career in lifestyle and fitness could be up next. (AP Photo/John Raoux)

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In this Saturday, Feb. 18, 2017 photo, Associated Press writer Jenna Fryer, left, watches as Danica Patrick does a hand stand during a workout at Daytona International Speedway, in Daytona Beach, Fla. Patrick has launched a clothing line and now she has developed workouts and meal plans for a new book titled "Pretty Intense.". (AP Photo/John Raoux)

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In this Saturday, Feb. 18, 2017, photo, Danica Patrick works out at Daytona International Speedway, in Daytona Beach, Fla. Patrick is really serious about health and clean eating, and as her driving days may be nearing an expiration date, a second career in lifestyle and fitness could be up next. (AP Photo/John Raoux)

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In this Saturday, Feb. 18, 2017 photo, Danica Patrick works out at Daytona International Speedway, in Daytona Beach, Fla. With Danica Patrick's auto racing career possibly nearing an end in the not-too-distant future, what might have seemed like an off-track hobby in the health and fitness world is being fast-tracked into something far bigger. (AP Photo/John Raoux)

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Kurt Busch, left, celebrates in Victory Lane with New England Patriots' Rob Gronkowski after winning the NASCAR Daytona 500 auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, Feb. 26, 2017. (AP Photo/Terry Renna)

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Kurt Busch celebrates in Victory Lane after winning the NASCAR Daytona 500 auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, Feb. 26, 2017. (AP Photo/Chuck Burton)

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Jimmie Johnson (48), Clint Bowyer (14), Kevin Harvick (4) and Danica Patrick (10) crash during the NASCAR Daytona 500 auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, Feb. 26, 2017. (AP Photo/John Moore)

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Ricky Stenhouse Jr. (17), Trevor Bayne (6) and Elliott Sadler (7) collide along the front stretch after coming out of Turn 4 during the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 26, 2017, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)

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Jimmie Johnson (48), Clint Bowyer (14), Chris Buescher (37), Kevin Harvick (4), D.J. Kennington (96) and Danica Patrick (10) collide in a multi-car wreck between Turns 3 and 4, as Landon Cassill (34) drives past, during the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 26, 2017, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)

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Kurt Busch (41) is swarmed by members of his crew after winning the NASCAR Daytona 500 auto race at Daytona International Speedway, Sunday, Feb. 26, 2017, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)