Sean Bernard Long (born 24 September 1976), also known by the nickname of "Longy", is an English former professional rugby league footballer, who is the current head coach of Oldham RLFC in the RFL Championship.

He began his career with the Wigan Warriors, and also played for the Widnes Vikings and Hull FC, but is best known for his time playing for St Helens in the Super League with whom he won a total of four Super League championships and five Challenge Cups, as well as numerous individual accolades including the Man of Steel award, and three Lance Todd Trophies.

Long played for St Helens from the interchange bench, kicking two goals in their 1999 Super League Grand Final victory over Bradford Bulls.

[19] Having won the 1999 Championship, St Helens contested in the 2000 World Club Challenge against National Rugby League Premiers the Melbourne Storm, with Long playing at scrum half back and kicking a goal in the loss.

Long played for St Helens at scrum half and kicked four goals in their 2000 Super League Grand Final victory over Wigan Warriors and was named as Man of Steel in 2000.

As Super League V champions, St Helens played against 2000 NRL Premiers Brisbane Broncos in the 2001 World Club Challenge.

[20] Having won Super League VI, St Helens contested the 2003 World Club Challenge against 2002 NRL Premiers Sydney Roosters.

St Helens reached the 2006 Super League Grand final to be contested against Hull FC and Long played at scrum half in Saints' 26–4 victory.

As 2006 Super League champions, St Helens faced 2006 NRL Premiers Brisbane Broncos in the 2007 World Club Challenge.

In the 1997 post season, Long was selected to play for Great Britain from the interchange bench in two matches of the Super League Test series against Australia.

[30] On 1 November 2011 it was announced he had signed a playing contract with Rugby Union side Preston Grasshoppers in SSE National League 2 North.

[citation needed] On 29 March 2021, Long was named as assistant coach for France as they prepare for the forthcoming 2021 Rugby League World Cup, alongside his responsibilities at Leeds Rhinos.