Buescher 10th, Keselowski 15th and Preece 16th in Southern 500 DARLINGTON, SC (August 31, 2025) – The Southern 500 is one of the season’s most demanding races, and Roush Fenway Keselowski (RFK) Racing met the challenge. Chris Buescher, Brad Keselowski, and Ryan Preece each delivered strong efforts ...