Through the 2013 season, Jimmie Johnson has 39DNF's during his Cup Series career.
The NASCAR driver with the most DNFs (did not finish) is Dave Blaney. Richard Petty is another driver with a lot of incomplete races.
The driver with the most Did Not Finish (DNF) in Formula 1 races is Andrea de Cesaris, with a total of 148 DNFs in his career.
Yes, Bill Lester raced in the Truck Series. There is also Derek Strong, former NBA player for L.A. Lakers, L.A. Clippers and Orlando Magic, among others. Derek Strong is the only NBA player to successfully transition into stock car racing as a driver. He is part owner of his team, Strong Racing. Don't forget Marc Davis who drives Nationwide races.
The high number of Did Not Finish (DNF) incidents in Formula 1 races is often due to technical issues with the cars, driver errors, or accidents on the track. These factors can lead to mechanical failures, crashes, or other issues that force drivers to retire from the race before completing it.