Jimmie Johnson has already accomplished so much during his motorsports career, and he’s making another unique piece of history later this month. On Tuesday, the seven-time NASCAR Cup Series champion revealed via press release that he’s joining NBC Sports for some broadcasting coverage over the remainder of the 2024 campaign, and he’ll also contribute to the coverage of the Indianapolis 500 on May 26. That’s special because afterwards, the Legacy Motor Club co-owner will race in the Coca-Cola 600 at Charlotte Motor Speedway. It’s not the conventional version like Kyle Larson is doing, but Johns…