El Hadji Baye Oumar Niasse (born 18 April 1990) is a Senegalese former professional footballer who played as a forward.

[12] He scored Lokomotiv's equalising goal in the Russian Cup Final against Kuban Krasnodar on 21 May 2015 as his side went on to win 3–1 after extra time.

[13] Niasse joined English Premier League club Everton on 1 February 2016 for a transfer fee of approximately £13.5 million, signing a four-and-a-half-year contract.

[16] He was informed by then-Everton manager Ronald Koeman he would need to search for a new club during the summer 2016 transfer window, saying, "[I]f Niasse likes to play football he needs to leave Everton.

[19] On 13 January 2017, Niasse signed a loan contract with Hull City until the end of the 2016–17 season with an option for a £10 million permanent transfer from Everton.

[22] His first goal for Hull and in English football came on 26 January in the EFL Cup semi-final second leg against Manchester United, where he made his first start for the club.

[31] Niasse sparked controversy in the match by appearing to dive to win Everton a penalty, which was converted by Leighton Baines to make the score 1–1 in the first half.

[32] He subsequently became the first Premier League player to be charged with "successful deception of a match official" under The Football Association's new regulations.

[34] On 18 January 2019, Niasse joined fellow Premier League team Cardiff City on loan for the remainder of the season.

[35] Niasse only played 3 Premier League games during the 2019–20 season, failing to start any of them, as Dominic Calvert-Lewin and Richarlison were the preferred attacking options.