Which Racing Series Does Rahal Letterman Lanigan Compete In and Who Are Its Drivers?

Rahal Letterman Lanigan (RLL) fields entries in two series: the NTT INDYCAR SERIES and the IMSA WeatherTech SportsCar Championship. Its INDYCAR program runs three cars — the No. 15, No. 45, and No. 47 — while its IMSA effort is the No. 59 RLL Team McLaren. Drivers named on the team's site include Foster, Rahal, Schumacher, and Takuma Sato. Because lineups change by event and by season, treat any name below as tied to the specific race noted, not as a permanent seat assignment.

The two series RLL races in

The site separates the two programs into their own navigation sections, each with its own News, Schedule, Drivers, Media, Galleries, Videos, and Partners pages. That structure is the quickest way to check who is driving what: the INDYCAR drivers page covers the No. 15/45/47 cars, and the IMSA drivers page covers the No. 59 entry.

INDYCAR drivers and car numbers

RLL's INDYCAR side is organized around three entries:

• No. 15 IndyCar Team
• No. 45 IndyCar Team
• No. 47 IndyCar Team

Drivers appearing in the team's recent coverage:

• Foster — took his second career INDYCAR pole at the inaugural Ontario Honda Dealers Indy at Markham, and started 11th at the Mission Foods Grand Prix of Monterey.
• Rahal — qualified 10th at Markham and earned his first podium since 2023 with third place at the Children's of Alabama Indy Grand Prix.
• Schumacher — qualified 11th at Markham; Vanda Pharmaceuticals was named primary sponsor of his No. 47 NEREUS™ Honda for four races (Nashville, Portland, Washington D.C., and Monterey).
• Takuma Sato — a two-time Indy 500 champion returning to RLL for the 110th running of the Indy 500, with AMADA AMERICA, Inc. as primary sponsor of his Indy 500 entry for a third consecutive year.

Note that Sato's entry is described specifically as an Indy 500 program, not a full-season seat — a good example of why you should read each item as event-specific.

IMSA drivers

The IMSA WeatherTech SportsCar Championship effort is the No. 59 RLL Team McLaren. For the season finale at Petit Le Mans, the team's drivers Esterson and Johnson were to be joined by Goethe. That is a one-race addition, so the IMSA lineup should be checked against the specific event rather than assumed.

How to verify the current lineup yourself

1. Go to the team's site and pick the series section you care about — INDYCAR or IMSA.
2. Open Drivers in that section. The INDYCAR page maps drivers to the No. 15, No. 45, and No. 47 cars; the IMSA page covers the No. 59 entry.
3. Cross-check against Schedule and the latest News posts. Race previews, qualifying reports, and post-race reports name who is in which car for that weekend, which is where one-off entries like Sato's Indy 500 ride show up.
4. For sponsor-linked seats, read the announcement itself — for example, the Vanda Pharmaceuticals release ties Schumacher to the No. 47 for a defined set of four races.

What the site also offers

Beyond lineups, the site carries upcoming race dates (Streets of St. Petersburg on Sun, Mar 7, 2027, and Roar Before The Rolex 24 on Fri, Jan 22 – Jan 24, 2027), a full schedule, video and gallery archives, partner listings, and an owners page. There is also a fan community signup for team news, exclusive content, and early access. The site does not publish pricing or ticket-purchase details in the material available, so check the schedule or contact pages for event-specific information rather than assuming anything about access or cost.

The practical takeaway: RLL races in INDYCAR with three cars and in IMSA with the No. 59 McLaren entry, and the only reliable way to know who is driving on a given weekend is to match the drivers page against the most recent race-specific news post.