ArcBest announced that Tim Thorne, president of ArcBest less-than-truckload carrier ABF Freight, will retire effective June 30, 2021, after a 31-year career with the company. Seth Runser, ABF vice president – linehaul operations, will be promoted to the new role of ABF chief operating officer, effective Feb. 1, 2021, and will become ABF president on July 1, 2021.