Chase grid profile: Jimmie Johnson, No. 8

Driver: Jimmie Johnson

Seed: 8

Team: Hendrick Motorsports, No. 48 Chevrolet

Crew Chief: Chad Knaus

Best Finish: 1st, Atlanta and Auto Club

Age: 40

Hometown: El Cajon, California

From the Daytona 500 through the Duck Commander 500 at Texas Motor Speedway, Jimmie Johnson looked like he was in his usual six-time championship form. He had two wins, an average finish of 6.4, and was right there at the top of the points standings.

Then the struggles and inconsistencies started for the No. 48 team. Johnson finished 23rd at Bristol in April and then placed outside of the top-15 in eight of the next 12 races, including three finishes of 30th or worse. After bottoming out with a last place finish at Watkins Glen, Johnson scored back-to-back top-10s before spinning at Darlington Raceway and finishing 33rd.

Johnson posted an average finish of 18.7 in the final 14 regular-season races and has season struggles from pit road to driver error and everything in between.

Five-defining moments