KANNAPOLIS, N.C. (AP) — Tony Stewart underwent successful surgery Tuesday to repair the broken right tibia and fibula suffered in a sprint car race in Iowa. Stewart will need a second surgery and remains hospitalized. There was no timetable for his return. Stewart-Haas racing named Max Papis as the substitute driver in the No. 14 for Sunday’s NASCAR race at Watkins Glen. Papis has made 35 career Sprint Cup starts.

Stewart was leading the 30-lap feature in a 360 winged sprint car with five laps remaining when a lapped car spun in Turn 4 and collected Stewart and two others. The sprint car accident Monday night came a day after Stewart finished ninth in the NASCAR race at Pocono Raceway. He’s 11th in the Sprint Cup standings with five races to go until the Chase for the championship field is set.