Mohammad Wardun bin Yussof (born 14 September 1981) is a Bruneian footballer who plays as a goalkeeper for Kasuka FC of the Brunei Super League.

[7] On 2 April 2017, Wardun dropped to the bench and missed his first league game in three years, allowing longtime rival Alizanda Sitom to be the oldest player to start in the S.League.

[10] Despite a pre-season injury to last season's starter Mu'izzuddin Ismail in 2018, Wardun was kept away from the starting lineup by the signing of youth international keeper Haimie Anak Nyaring.

[13] His form continued into the second half of the season when on 6 July, in the away game against Warriors FC, Wardun produced a string of magnificent saves including saving a Jonathan Béhé penalty and keeping out a point-blank header by Khairul Nizam in the final minutes of the game to keep the score at 3–3 and thus salvage a point for DPMM.

[18] He subsequently moved to Kasuka FC and made his debut at the 2024–25 ASEAN Club Championship qualifying play-offs against Shan United on 17 July in a 1–1 draw.

After a huge gap without any international appearances, Wardun played in the 2008 Suzuki Cup qualifying when the whole Brunei team was represented by his club, DPMM FC.

[24] In the semi-final against Macau on 12 November, Wardun was sent off in the 55th minute for denying Niki Torrão a goal-scoring opportunity at the edge of the penalty box.