[1] Usher participated in the 2019 World Masters,[2] where he reached the quarter-finals but lost there to Mario Vandenbogaerde 4–2 in sets.
[3] In 2020, 2021 and 2022 consequently, he took his part in PDC Q-School three times, but failed to get a Tour Card.
[5] In 2022 he played in the MODUS Super Series, where he hit a nine-dart leg in July in a match against Dan Read.
He was defeated by Conan Whitehead in the October 2022 MODUS Super Series.
[6] Usher qualified for a PDC Tour Card for the first time at the 2023 Q-School, defeating Adam Warner on the second finals day.