Landon Douglas Cassill (born July 7, 1989) is an American former professional stock car racing driver.

Cassill was born in Cedar Rapids, Iowa, and began racing on a quad when he was 3 years old.

Cassill won four International Kart Federation (IKF) championships, some on dirt and some on asphalt.

Answering questions afterward about the win, Landon replied, "Hey rubbin's just racin what can I say!

Along with his driving duties, Cassill has worked in the team's research and development program and drove during practices for the Hendrick pit crews.

He was in contention to score his first Top 10 finish at Memphis before another driver spun him out on the final lap.

He won his first pole at Loudon, but had to start at the back of the field due to an engine change.

In 19 starts, Cassill earned five Top 10 finishes and won Rookie of the Year honors.

He also drove a limited schedule in the Truck Series for Randy Moss Motorsports; garnering three Top 10 finishes.

Cassill made his lone 2009 start on October 24 at Memphis; driving Phoenix Racing's No.

Cassill made his Cup Series debut at Michigan; driving for veteran team owner James Finch.

Cassill started the 2011 season with a 3rd-place finish in the opening Nationwide series race: the DRIVE4COPD 300 at Daytona.

On January 17, 2013, it was announced that Cassill would leave BK Racing due to contract disagreements.

[11] In early March, it was revealed that Cassill was suing BK Racing for a claim of unpaid winnings.

4 Chevrolet in the 2014 NASCAR Nationwide Series for JD Motorsports, replacing Mike Wallace as the team's lead driver,[14] in addition to returning to the No.

[16][17][18] On December 16, 2014, G&K Services re-upped as a full-time associate sponsor with multiple primary sponsorships in select markets.

He ran very strongly in the 2015 Coke Zero 400, but his underfunded car was involved in a massive crash on the last lap at the checkered flag; he would finish 13th.

Cassill had his best performance of the season in the Food City 500, where he led 20 laps on a contrary fuel strategy to a 22nd-place finish.

[22] His main sponsors were Starkey Hearing Foundation, CSX (Play it safe), and Love's Travel Stops.

00 Chevrolet Camaro with sponsorship from the United States First Responders Association beginning at Martinsville.

Cassill would return once again at Bristol with sponsorship from Superior Essex and TW Cable where he would finish in the 20th position.

[25] In April 2019, Cassill returned to JD Motorsports for the Talladega Xfinity race, driving the No.

[25] Thus, he planned to run a full Xfinity schedule for Shepherd Racing Ventures pending funding.

[33] Cassill instead served as a substitute in the event of a driver testing positive for COVID-19, though his duties were ultimately not required.

[35] Ahead of the Dover race in May, Cassill swapped cars with JDM teammate Ryan Vargas and moved to the No.

[38] His best run of the 2022 season would come at New Hampshire, leading 17 laps and finishing 3rd although he was disqualified in post-race technical inspection and would be scored 37th.

In May 2024, he paid US$25,000 as part of a US$2.42 million deal by himself, Rob Gronkowski, and Victor Oladipo to settle a class-action lawsuit filed by individuals who invested in Voyager.