Ten closest finishes of the 2017 NASCAR season

Darrell Wallace Jr. - CWTS Michigan - 0.176 margin of victory

Darrell Wallace Jr. holds off the Kyle Busch Motorsport teammates of Christopher Bell and Kyle Busch to win in his only start of the 2017 Camping World Truck Series season.

Johnny Sauter - CWTS Texas - 0.170 margin of victory

Johnny Sauter wins his way into the Championship 4, fending off rookie Austin Cindric.

Aric Almirola - Xfinity Talladega - 0.142 margin of victory

Aric Almirola takes the checkered flag for his third career NXS win over series regular Elliott Sadler.

Kyle Busch - Cup Martinsville - 0.141 margin of victory

Kyle Busch survives the late-race carnage at NASCAR's shortest track to take his fifth and final victory of the season over title rival and eventual champion Martin Truex Jr.

Kyle Larson - Xfinity Fontana - 0.127 margin of victory

Kyle Larson beats fellow Cup driver Joey Logano to the line for his first of three victories during the 2017 Xfinity season.

William Byron - Xfinity Indianapolis - 0.108 margin of victory

Rookie William Byron holds off a hard-charging Paul Menard at Indianapolis, the site of Menard's lone Cup win back in 2011.

Ricky Stenhouse Jr. - Cup Talladega - 0.095 margin of victory

Ricky Stenhouse Jr. scores his first ever Cup victory at Talladega Superspeedway, ending a winless streak exceeding 100 races.

Ben Rhodes - CWTS Las Vegas - 0.066 margin of victory

Another first-time winner in Ben Rhodes, who held back Christopher Bell in the closing laps at Las Vegas Motor Speedway, but it wasn't by much.

Ryan Preece - Xfinity Iowa - 0.054 margin of victory

Speaking of first-time winners ... Ryan Preece and Joe Gibbs Racing teammate Kyle Benjamin were both looking for their first win at Iowa Speedway, but it was Preece that prevailed in this nail-bitter of a finish.

Denny Hamlin - Xfinity Michigan - 0.012 margin of victory

And now for what was easily the closest finish of the 2017 season. William Byron was denied his first Xfinity win by Cup veteran Denny Hamlin, who charged underneath him out of the final corner, just edging the rookier driver at the finish line. But Byron would not stay winless for long, going on to win four races and the series championship.