Olle Alsing was born on May 1, 1996 in Uppsala, Sweden and currently plays defense for Djurgårdens IF in the Swedish Hockey League. Alsing grew up playing primarily for the Almtuna program before making the jump to the SHL with Leksands during the 2016-17 season. On May 10, 2019, Olle signed a two-year Entry-Level Contract with the Ottawa Senators.