Koh registered a tremendous showing at the Ranger Invitational, leading Drew to its sixth straight team title. He won six events and had a hand in eight meet records, five school records, and two Landmark Conference records while achieving three NCAA B-cuts. Individually, Koh won both the 100-butterfly (48.25) and 200-butterfly (1:48.56), setting meet, school, and conference records and earning B-cuts in both events. He also swam on four winning relay teams that all set meet records, with two of them (200-freestyle, 400-freestyle) breaking Drew records as well. Additionally, Koh set a meet and school record while picking up another B-cut with his leadoff 100-backstroke relay split of 49.44, and he broke a meet record with his leadoff 100-freestyle relay split of 46.43.