Mike Rockenfeller, 39, will drive the No. 42 Legacy Motor Club (LMC) Chevrolet following the indefinite suspension of Noah Gragson.
The German racing driver will also run Watkins Glen the week after IMS. Josh Berry drove the car this past weekend in Michigan.
Gragson was suspended after liking a meme that mocked the 2020 murder of George Floyd at the hands of Minneapolis police officers.
Rockenfeller won overall at the 24 Hours of Le Mans in 2010 and claimed a class victory there in 2005. He also won the DTM title in 2013 and has two previous NASCAR Cup Series starts.
Both appearances came last year, driving the No. 77 Spire Motorsports Chevrolet at Watkins Glen and later at the Charlotte Roval. He finished 30th and 29th, respectively.
Rockenfeller is good friends with LMC co-owner Jimmie Johnson. They were co-drivers during this year's Le Mans 24, piloting the popular Garage 56 NASCAR entry alongside 2009 F1 World Champion Jenson Button.
Rockenfeller and Johnson were also co-drivers in several IMSA races over the past two years, finishing second in the 2021 Rolex 24 together. 'Rocky' also won the Rolex 24 overall in 2010.
Source: Autosport