For 2013, Stewart received a new primary sponsor in Bass Pro Shops, which moved over from Earnhardt Ganassi Racing to replace Office Depot. Bass Pro Shops joined Mobil 1, which sponsored eleven races while Bass Pro Shops sponsored eighteen. As of June 20, 2013, sponsorship for the other nine races has yet to be determined, although Stewart said Haas Automation could serve that role if absolutely necessary. Stewart subsequently won the 2013 FedEx 400. On August 5, Stewart broke his right leg in a sprint car accident, and was replaced by Max Papis at Watkins Glen. Austin Dillon was named to drive the 14 at Michigan. After the Michigan race, it was announced that Stewart would miss the remainder of the season, with Mark Martin stepping in as a replacement for twelve of the thirteen races, with Dillon driving at Talladega.