Al Unser Jr.: Indy 500 winner twice, son of Al Sr., nephew of Bobby, Daytona 500 driver

Retired racing driver Al Unser Jr. attends the fifth annual 500 Prelude, benefiting the Survivors of Violence Foundation at Prime 47 steakhouse in Indianapolis on Wednesday, May 9, 2018. The Survivors of Violence Foundation, which provides reconstructive surgery and scar therapy to survivors of violence with the greatest financial and health care needs was founded by Dr. Greg Chernoff and survivor Royia Grizzell.

Al Unser Jr., right, with his father, Al Unser Sr., at the 1985 Beatrice Indy Challenge at Tamiami Park in Miami.

Al Unser Jr. won the Indianapolis 500 twice and secured two IROC titles with victories at Watkins Glen International.

Al Unser Sr. congratulates his son Al Unser Jr. after he won the 1994 Indianapolis 500.

Al Unser Jr. drives a historic car Sunday, May 26, 2024, ahead of the 108th running of the Indianapolis 500 at Indianapolis Motor Speedway.

Actor Brett Varvel, who plays main lead Chris Stone in Mayberry Man, a comedy series based on "The Andy Griffith Show," looks over a script Thursday, April 27, 2023, with two-time Indianapolis 500 champion Al Unser Jr. during filming at Lucas Oil Indianapolis Raceway Park. The series will stream this fall.

Nov 10, 1985; Miami, FL, USA FILE PHOTO; Indy car drivers Al Unser Sr (right) and Al Unser Jr (left) during the 1985 Beatrice Indy Challenge at Tamiami Park. Mandatory Credit: Manny Rubio-USA TODAY Sports

Al Unser Jr. near the Watkins Glen Harbor Hotel along Seneca Lake on Sept. 9, 2022. Unser was named grand marshal for the 2022 Hilliard U.S. Grand Prix, held Sept. 8-11 at Watkins Glen International.

Al Unser Sr. celebrates with son Al Jr. in Victory Lane on April 23, 2000 after his win in the Vegas 300 IRL race at Las Vegas Motor Speedway

Al Unser Jr. dresses for practice laps during the Indy 500 in 2004.

Al Unser, Jr., signs an autograph before being introduce at the Indy Legends Charity Pro-Am race, Saturday, June 16, 2018, at the Indianapolis Motor Speedway. The event is part of the Brickyard Vintage Racing Invitational weekend at the track organized by the Sportscar Vintage Racing Association.

Nov 10, 1985; Miami, FL, USA FILE PHOTO; Indy car driver Al Unser Jr during the 1985 Beatrice Indy Challenge at Tamiami Park. Mandatory Credit: Manny Rubio-USA TODAY Sports

Former Indy500 winner Al Unser Jr., sit in his old race car before the start of the102nd running of the Indianapolis 500 at Indianapolis Motor Speedway on Sunday, May 27, 2018.

Al Unser Jr of the United States, driver of the #2 Marlboro Team Penske Penske PC-24 Mercedes IC 108C celebrates on the podium after winning his fifth Championship Auto Racing Teams (CART) 1995 PPG Indy Car World Series Toyota Grand Prix of Long Beach race on 9th April 1995 on the Streets of Long Beach course, Long Beach, California, United States. (Photo by Stephen Dunn/Allsport/Getty Images)

Retired racer Al Unser, Jr. offers encouragement to the competitors as they race along the track at the Indianapolis Motor Speedway. Runners take a lap around the track at the Indianapolis Motor Speedway as they compete in the 42nd Annual OneAmerica 500 Festival Mini-Marathon, Saturday, May 5, 2018.

Al Unser Jr. greets spectators before the start of the 101st running of the Indianapolis 500 at Indianapolis Motor Speedway, Sunday, May 28, 2017.

Al Unser Jr.,right, and his teammate Peter Klutt, left, before the start of the Indy Legends Charity Vintage Pro/Am race at the SVRA Brickyard Vintage Racing Invitational Saturday, June 18, 2016, at the Indianapolis Motor Speedway.

Al Unser Jr. poses in his Albuquerque home.

Event host and first lady of racing, Linda Vaughn, left, and retired race car drive Al Unser Jr. are interviewed for TV during the third annual 500 Prelude, hosted by the first lady of racing, Linda Vaughn, at the Indianapolis Motor Speedway Museum, Monday May 16th, 2016. The event benefitted the Survivors of Violence Foundation founded by Aesthetic Facial Plastic and Reconstructive Surgeon Dr. Greg Chernoff, and 1995 Oklahoma terrorist bombing survivor Royia Grizzell.

Al Unser Jr. gives the thumbs up on his way practice. Carb day at the Indianapolis Motor Speedway kicked off with the last practice before Sunday's race. All drivers practiced for an hour on Friday morning, May 25, 2007. (Sam Riche / The Indianapolis Star)

Al Unser Jr. talks about the up coming SVRA Pro Am Vintage race Friday June 6, 2014 at The Indianapolis Motor Speedway.

Al Unser Jr., right, chats with Arie Luyendyk, left, at the Linda Vaughn 500 Prelude, benefiting the Survivors of Violence Foundation, held at the Dallara Indy Car factory in Speedway, May 12th, 2015.

Former IndyCar driver and Indianapolis 500 winner Al Unser Jr. stops to greet fans in the garage area Monday, May 11, afternoon at the Indianapolis Motor Speedway.

Former driver Al Unser Jr. drives a historic car during the 107th running of the Indianapolis 500 at Indianapolis Motor Speedway in Indianapolis on May 28, 2023.

Al Unser Jr. winner of the Pro-Am race June 8, 2014 at the SVRA Brickyard Invitational vintage event at the Indianapolis Motor Speedway

Al Unser Jr.,left, congratulates Willy T. Ribbs following the Indy Legends Charity Pro/Am Sunday afternoon.

Nov 10, 1985; Miami, FL, USA FILE PHOTO; Indy car driver Al Unser Jr during the 1985 Beatrice Indy Challenge at Tamiami Park. Mandatory Credit: Manny Rubio-USA TODAY Sports

Aug 11, 1996; Lexington, OH, USA; FILE PHOTO; Indy (CART) series driver Al Unser Jr. races in the Miller 200 at Mid-Ohio Sports Car Course. Mandatory Credit: Matthew Emmons-USA TODAY Sports