Ho-Sang split his junior career between Windsor and Niagara of the Ontario Hockey League. In 256 OHL games, he had 292 points (82 goals, 210 assists). A first-round pick by the Islanders (No. 28) in the 2014 NHL Draft, Ho-Sang turned pro for the 2016-17 season with Bridgeport of the American Hockey League. He had 36 points (10 goals, 26 assists) in 50 games and was the CCM/AHL Rookie of the Month for February 2017 after having 15 points (five goals, 10 assists) and a plus-9 rating in 12 games.