Oct. 5—WINNER, S.D. — Karson Keiser wants to compete. His drive for competition lasts all year, from football and golf in the fall to track and field in the spring and baseball in the summer. In whichever sport he does compete in, including wrestling in the winter months, Keiser invests his time in full. “I just love to compete,” Keiser said. “You have to find the time to do it or else you’re …