Race format and rule changes

All three of NASCAR's main national series adopted a new race format and points system for the 2017 season. Under the new format, each race was divided into three stages. A competition caution is held at the end of the first and second stage, and bonus championship points are awarded to the top 10 drivers. For the 500, the first and second stages each comprised 60 laps of the scheduled distance, with the remainder comprising the third. The leader at the end of each stage, including the overall winner, also receives points that are carried over into their total if they qualify for the season-ending playoffs (renamed from the Chase for the Championship).^[17][18][19]

The race also introduced stricter rules in regard to vehicle repair after on-track accidents; teams are only allowed to repair their cars on pit road in five-minute windows with six crew members, starting once the car crosses the pit road commitment line, and ending when it reaches minimum speed after exiting pit road. Repairs are restricted to repairing sheet metal and re-attaching or reinforcing body panels; body panels may not be replaced. If the vehicle cannot be repaired on pit road and must be taken to the garage, more than six crew members work on the vehicle, or the five-minute clock expires, the vehicle will be removed from the race and cannot return.^[20][21][22]

Other technical changes took place for the 2017 season and Daytona 500, including having one fewer set of tires available for the race,^[23] teams being required to start the race with the same tires used in qualifying,^[23] restrictor plate size openings reduced from 57⁄64 inch (23 mm) to 7⁄8 inch (22 mm),^[24] and new structural safety features—some of which are specifically mandated at Daytona and Talladega.^[24]

First practice (February 18)

Joey Logano was the fastest in the first practice session with a time of 46.604 seconds and a speed of 193.116 mph (310.790 km/h).^[25]

Qualifying results

• -Indicates open team. Gaughan and Sadler were the two fastest open teams in qualifying.

Duel 1

Chase Elliott held off late charges in the closing laps to win the first Can-Am Duel race.^[28]

Restarting with eight laps to go, the Fords of Kevin Harvick and Brad Keselowski formed a line on the top side to make a charge at him. The line started stalling out with five to go and was no match for Elliott, only challenged by Harvick and Jamie McMurray.

He said in victory lane that he certainly thought he had a chance of winning on Sunday and that if he "didn't feel that way...I'd stay home. I feel like we have a shot on Sunday. I feel like we had a shot before we got down here. Tonight's result hasn't changed my opinion on that. I'm looking forward to it, obviously. You love to get that qualifying spot on Sunday, but we really earned it tonight, to start on the front row, which is even better. It was definitely a great way to start the season."^[29]

The eight-lap run to the finish was set up by a two-car wreck with 12 laps to go. Coming through the tri-oval heading towards Turn 1, Corey LaJoie rear-ended Reed Sorenson, who checked up, turning Sorenson down into Paul Menard, sending Sorenson down the track and into the inside retaining wall.^[30] Sorenson, who missed the race as a result of this wreck, said he guessed LaJoie "felt like he did what he had to do to make the race. I hope he's proud of that part of it. There's a lot of pressure going in to making this race. It's a very big deal for a small team like ours."^[31]

Duel 2

Dale Earnhardt Jr. dominated the second Duel race leading 53 of 60 laps. That total, however, didn't include the final lap as he lost the lead for the victory on the final lap to Denny Hamlin.^[32]

Hamlin received a push from Austin Dillon and faked Earnhardt out on the backstretch to pass him going into Turn 3 to win the second Duel race. He credited Dillon for the "great push there....We worked really well together that entire race. I'll keep that in mind in the 500....I can't thank this team enough for a great job by Wheels (Mike Wheeler, crew chief). FedEx announced their renewal today so that's a great sign of a great year hopefully to come."^[33]

With 18 laps remaining, Ryan Blaney and Jimmie Johnson made contact on the backstretch. Five laps later, Johnson blows a right-side tire and slams the wall in Turn 3, setting up the final nine laps.^[34]

Starting lineup

Second practice

David Ragan was the fastest in the second practice session with a time of 46.178 seconds and a speed of 194.898 mph (313.658 km/h).^[36]

Third practice

Kyle Busch was the fastest in the third practice session with a time of 45.624 seconds and a speed of 197.265 mph (317.467 km/h).^[37]

Final practice

Ricky Stenhouse Jr. was the fastest in the final practice session with a time of 45.351 seconds and a speed of 198.452 mph (319.378 km/h).^[38]

Stage 1

Chase Elliott led the field to the green flag at 2:40 p.m. He jumped ahead of teammate Dale Earnhardt Jr. to lead the first lap. Earnhardt was caught in the middle of the inside and outside lines with no draft help, also known as the "sucker hole," and fell back through the pack on the fourth lap. Jamie McMurray used the bottom line to take the lead on the eighth lap. Joey Logano made an unscheduled stop for a loose wheel on lap 14. A group of cars, all Toyota's, hit pit road on lap 17. Erik Jones overshot his pit box and Daniel Suárez was hit with a pass through penalty for speeding. Matt Kenseth came down pit road a second time for a loose wheel; a result of flat-spotting his tires on his first stop.^[39]

During the Toyota pit cycle, Kevin Harvick took the lead from McMurray on lap 18. The lapped car of Logano blocked his advanced and allowed Elliott to power by on the outside line on lap 23. The top line started losing steam, however, and Harvick took back the lead on lap 26. Another group of cars hit pit road on lap 31. Corey LaJoie mistimed his pit entry and aborted right before the entrance of pit road. When he did, he almost slammed into the rear of Clint Bowyer. Then, his car continued up the track, slammed the outside wall in the tri-oval and left debris up against the wall, bringing out the first caution of the race. Kurt Busch restarted the race from the tail end of the field for speeding on pit road.^[40]

The race restarted on lap 34. Kyle Busch lead the outside line charge past Harvick on the backstretch to take the lead on lap 43. Truex followed likewise the next lap, powering by Busch on the top line going into Turn 1 to take the lead. Busch took it back on lap 45. Ryan Blaney dove under him on the backstretch to take the lead on lap 49. David Ragan hit the wall on the frontstretch the following lap, but the race continued under green. Busch retook the lead on lap 52. Ricky Stenhouse Jr. cut down a tire in Turn 3, but the race remained green. Busch came to the line the leader at the conclusion of stage 1 and the second caution flew on lap 61 for the end of the stage. Harvick exited pit road first. Austin Dillon restarted the race from the tail end of the field for speeding.^[39]

Stage 2

The race restarted on lap 68. For most of the second stage, the racing was more calm and collected. The outside line was the strongest line and the inside started dissipating by lap 78. The Toyota cars repeated their stage 1 move of short-pitting the segment on lap 81. Jimmie Johnson took the lead as a number of cars, mostly Ford's, came to pit road on lap 90. Earnhardt took the lead for the first time on lap 97.

Rounding Turn 3 on lap 105, Busch's car suffered either a left or right-rear tire blowout, then spun towards the wall and into Jones, Kenseth and Ty Dillon, causing a 6-car pileup.^[41] Race leader Earnhardt was clipped by Busch and slammed the wall.^[42] He said he didn't "know what happened there with the No. 18 (Busch) he just got turned around. I tried to get the wheel turned and get down the race track but I lifted off the gas to miss it, and got on the splitter a little bit and the car went straight. We jumped him, and got in the wall a little bit. Wasn't too hard of a hit. We thought we could get the car fixed, and get back out there and see what we could do with the rest of the day and make up some spots maybe. But, there is just too much damage. The radiator is pushed back. The toe is all messed up. The front suspension is knocked around pretty bad so the upper A-frame is laid over on the motor. We just can't drive it like that."^[43] He checked out of the infield care center with no health complications.^[44] Earnhardt, who missed 18 races last season due to a concussion, credited his new headrest for walking away without another one, saying "the (older) headrest, when you fly into the wall, it's like getting hit with a baseball bat. That car will take a few (G-forces) and if you have a lot of distance there, you can double the G's. We talked to NASCAR over the winter and they helped me understand how to better withstand those wrecks. We have (the headrest) tight on both sides."^[45] Busch took his frustration out on Goodyear.^[46] "Nothing that we did wrong," Busch said to FOX. "Obviously Goodyear tires just aren't very good at holding air. It's very frustrating when we have that every single year we've been here. Last year we had it as well too. It wrecked us in practice and tore up a car."^[47] Kenseth finished the race in 40th, his third career last-place finish.^[48] This brought out the third caution and cleanup necessitated a 17-minute red flag period. Elliott Sadler was the leader when the race resumed under caution, but surrendered the lead to Harvick when he hit pit road.^[39]

The race restarted on lap 113 and Harvick led all the way to the end of stage 2 as the fourth caution flew for the stage conclusion. All but the first eight cars opted to pit under the caution.^[39]

Stage 3

The race restarted on lap 125. Kyle Larson took the position for a brief moment, but Elliott powered by on the outside line and retook the lead on lap 126. Kasey Kahne on the inside line edged his teammate at the line to take the lead for the first time on lap 127. On the same lap, McMurray shoved Johnson down the backstretch when Johnson got loose, turned down into Trevor Bayne and pin-balled through the middle of the pack in Turn 3, collecting 14 cars.^[49] This brought out the fifth caution. Johnson said afterwards that the whole wreck was avoidable, "and it wasn't called for. From the minute I got off of Turn 2 on the entire back straightaway, I kept getting hit, and the rear tires are off the ground."^[50]

The race restarted with 67 laps to go. With 65 to go, Blaney signaled on the backstretch that he was coming to pit road this lap, believing he had a tire going down. Exiting Turn 4, he started decelerating to dive onto pit road when Sadler swerved up the track to avoid him. This clipped both Bayne and Stenhouse, sent them down the track and into the inside wall, bringing out the sixth caution. Kahne took the lead prior to the caution^[39]

The race restarted with 59 to go. Heading down the backstretch, McMurray, in the top line, tried passing to the inside of Elliott, but his advance was blocked. He checked up and got hooked into the outside wall by Brendan Gaughan. Suárez swerved to the left to avoid a t-bone collision with McMurray, only to collide with Ryan Newman. The accordion effect resulted in an 11-car wreck that brought out the seventh caution.^[51] "I haven't seen the replay yet," Keselowski said after being caught up in the wreck, "but everybody wrecked in front of me. We had just pitted and were running really good, right up at the front where we needed to be in contention for a solid finish and hopefully a win. … That is unfortunate."^[52] Austin Dillon took the lead prior to the caution.^[39]

The race restarted with 52 to go. Logano took the lead with 51 to go. On the backstretch with 50 to go, Elliott shunted Joey Gase, which sent him into the outside wall and down the track, bringing out the eighth caution. Cole Whitt opted not to pit under the caution and assumed the lead.^[39]

The race restarted with 47 to go. Whitt lead the first lap after the restart, thanks to a push from Logano on the inside line, but Aric Almirola powered by Whitt on the outside to take the lead with 45 to go. Suddenly, Almirola slowed up and fell back, handing the lead to Larson with 43 to go. After battling side-by-side for a few laps, Logano took the lead with 37 to go. The top-five raced single-file with 31 to go. Kurt Busch led the outside line charge before Elliott took it over with 27 to go. The next lap, he cleared Logano for the race lead on the backstretch. With 20 to go, the bottom line disappeared and the top-12 cars formed a breakaway draft running up against the wall. Blaney broke out of line to lead the inside line's charge with 10 to go, but they made no progress and rejoined the top line with seven to go.^[53] With four to go, Elliott ran out of gas and Martin Truex Jr. took the lead in Turn 4.^[54] With two to go, the same fate befell Truex. Larson took command of the race with one lap to go.^[55] He also ran out of gas; Busch passed him exiting Turn 2 and won the 59th running of the Daytona 500.^[56]

Post-race

Race results

Final Stage Results

Stage 3 Laps: 80

Race statistics

• Lead changes: 37 among 18 different drivers
• Cautions/Laps: 8 for 40
• Red flags: 1 for 17 minutes
• Time of race: 3 hours, 29 minutes and 31 seconds
• Average speed: 143.187 miles per hour (230.437 km/h)

Television

Since 2001—with the exception of 2002, 2004 and 2006—the Daytona 500 has been carried by Fox in the United States. The booth crew consisted of longtime NASCAR lap-by-lap announcer Mike Joy, three–time Daytona 500 champion Jeff Gordon, and 1989 race winner Darrell Waltrip. Pit road was manned by Jamie Little, Chris Neville, Vince Welch and Matt Yocum.

Radio

The race was broadcast on radio by the Motor Racing Network—who has covered the Daytona 500 since 1970—and simulcast on Sirius XM NASCAR Radio. The booth crew consisted of longtime announcer Joe Moore, Jeff Striegle and 1989 Cup Series champion Rusty Wallace. Longtime turn announcer – and prodigy of MRN co-founder Ken Squier – Dave Moody was the lead turn announcer. He called the Daytona 500 from atop the Sunoco tower outside the exit of turn 2 when the field was racing through turns 1 and 2. Mike Bagley worked the backstretch for the Daytona 500 from a spotter's stand on the inside of the track. Kyle Rickey called the Daytona 500 when the field was racing through turns 3 and 4 from the Sunoco tower outside the exit of turn 4. On pit road, MRN was manned by lead pit reporter and NASCAR Hall of Fame Executive Director Winston Kelley. He was joined on pit road by Steve Post and Alex Hayden.