BEITOSTØLEN, Norway — On the final day of International Ski Federation (FIS) preseason racing in Beitostølen, one 20 year old stood above the rest of the nearly 90-man field. Johannes Høsflot Klæbo, who won three gold medals at the 2016 Junior World Championships in Rasnov, Romania, held off several household Norwegian names in the men’s freestyle sprint final. Klæbo, a Norwegian U23 Team member, won the final after rounding the men’s 1.7-kilometer course in 3:18.5 minutes. He nipped national-team member Pål Golberg by...