Jens David Joacim Moberg Karlsson (born 20 March 1994) is a Swedish professional footballer who plays as a winger or a forward for IFK Norrköping.

[5][6] Moberg Karlsson scored his first goal for Sunderland in the Premier League Asia Trophy against Tottenham Hotspur on 24 July 2013.

He made his competitive debut against Milton Keynes Dons in the Football League Cup, starting in a 4–2 victory.

[8] On 13 August 2014, Karlsson joined Danish club FC Nordsjælland on a four-year contract for an undisclosed fee.

[13] On 27 July 2024, Karlsson rejoined IFK Norrköping and was presented on field at half time during a game against Kalmar FF, signing a contract through the 2026 season.