Rahal Letterman Lanigan Racing driver Takuma Sato (30) celebrates with team co-owners Mike Lanigan, David Letterman and Bobby Rahal after winning the 104th Indianapolis 500 at Indianapolis Motor ...

David Letterman 28 photos INDIANAPOLIS - David Letterman has a new No. 1 on his personal Top Ten list of reasons he loves the Indianapolis 500. The freshly retired Letterman was all grins Sunday ...

David Letterman has a new No. 1 on his personal Top Ten list of reasons he loves the Indianapolis 500. The freshly retired Letterman was all grins early Sunday as his IndyCar team paid tribute to ...

This story first published May 23, 2017. David Letterman is probably the Indianapolis 500's highest profile superfan. He never misses the race and rarely skips qualifications. He co-owns a race team.

In David Letterman ‘s first weekend as a retiree, the now-former Late Show host slipped into the role of IndyCar team co-owner by appearing at Sunday’s Indianapolis 500.

Before he became an iconic talk show host, David Letterman, whose last show was Wednesday night, moonlighted as a pit reporter at the Indianapolis 500.

Letterman is a long-time supporter of the Indianapolis 500 dating all the way back to the 1950s and '60s when he was a youngster and later a college student at Ball State.

David Letterman grew up about 20 miles from Indianapolis Motor Speedway, and if the wind was right and the ears were sharp, he could hear engines in the distance in the month of May.

There have been plenty of David Letterman tributes over the past week, but one in particular stood out this weekend: a caricature of his face with the Late Show logo on a car in the Indianapolis 500.

Rahal Letterman Lanigan Racing driver Takuma Sato (30) celebrates with team co-owners Mike Lanigan, David Letterman and Bobby Rahal after winning the 104th Indianapolis 500 at Indianapolis Motor ...

Letterman got into team ownership in the 1990s with former Indy 500 champion Bobby Rahal, and businessman Mike Lanigan came aboard to form what is now Rahal Letterman Lanigan Racing.