It seems like long ago when Bayne shocked the racing world by becoming the youngest Daytona 500 winner ever in 2011. In his first full Cup season in 2015, he struggled migthily -- managing just two top 10s and finishing 29th in the points for Roush Fenway Racing.
9. Greg Biffle
Obviously, Roush Fenway Racing is behind the other big teams in finding speed, but still, more was expected from the veteran Biffle than he was able to deliver in 2015. He failed to win a race for the second season in a row, the first time in his career that's happened. He finished 20th in the points.
8. Austin Dillon
In his second full season driving the No. 3 for Richard Childress Racing, Dillon finished 21st in the points -- one spot lower in the points than he did as a rookie. He posted just one top-five and five top-10 finishes and has yet to win a race in 85 career Cup starts.
Getty ImagesJeff Curry
7. Sam Hornish Jr.
Hornish didn't have the best ride, driving for Richard Petty Motorsports. But he didn't do much with it, either, finishing 26th in points while registering just three top 10s (and no top fives) all season.
NASCAR via Getty ImagesJared C. Tilton
6. Danica Patrick
Yes, she showed some improvement, jumping four spots in the points to 24th over her second Cup season. But she had fewer top-10 finishes (two compared to three) and led a total of just seven laps, which was eight fewer than in 2014.
Getty ImagesJonathan Ferrey
5. Ricky Stenhouse Jr.
Stenhouse remains in the unenviable position of driving a car for Roush Fenway Racing that lacks speed while he's compared every week to his girlfriend, Danica Patrick. He finished one spot lower than Patrick in the points, in 25th, and led only three laps all season.
Getty ImagesChristian Petersen
4. Kyle Larson
Running in 35 of the 36 races (he sat out Martinsville in the spring after fainting at an autograph session), Larson failed to build on his 2014 Rookie of the Year campaign. He had only two top-five finishes, six fewer than in '14, and seven fewer top-10 finishes while failing to win a race. He was 19th in points.
Getty ImagesMike Ehrmann
3. Michael Waltrip Racing
Michael Waltrip Racing closed its doors after a tumultuous 2015 season in which Clint Bowyer (right) made the Chase, but no MWR cars reached Victory Lane and co-owner Rob Kaufmann announced he was pulling out to align with Chip Ganassi Racing and Felix Sabates.
Getty ImagesTim Bradbury
2. Kasey Kahne
While the other three Hendrick Motorsports cars all won races and made the Chase, Kahne finished 18th in the points and did not win a single race for the first time since 2010, when he drove for Richard Petty Motorsports. He led only 66 laps all season, and more than a total of six in just two events.
Getty ImagesChristian Petersen
1. Tony Stewart
Stewart not only didn't win any races for the second year in a row, but for the very first time in his 17-year Cup career failed to record a single top-five finish. He finished 28th in points and announced he will retire as a driver at the end of the 2016 season.