Because Wieser was born in 1993, he was eligible to play for the newly formed Basel Under-19 team in the 2011–12 NextGen series.

[4] FC Zürich launched legal proceedings against Wieser after the 21-year-old committed a knee-high challenge on Gilles Yapi Yapo in a match on 9 November 2014, leaving the former Ivory Coast international's career in serious doubt.

[6] Wieser was shown a straight red card for the tackle, and was later suspended for six matches by the Swiss league.

[7] With Yapi Yapo highly unlikely to ever play again, club president Ancillo Canepa launched legal proceedings against Wieser.

[12] On 22 July 2018 he scored his first goal for the club in Vaduz's first match of the 2018–19 Swiss Challenge League, a 3–1 victory over FC Chiasso.