Joseph Sonny Vagana (born 21 January 1975), also known by the nickname of "Big Joe", is a former professional rugby league footballer who played as a Prop forward in the 1990s and 2000s.

He became one part of the Bradford Bulls' Awesome Foursome, a phrase coined by the media, alongside Stuart Fielden, Brian McDermott and Paul Anderson.

Vagana played for the Bradford Bulls at prop forward in their 2001 Super League Grand Final victory against the Wigan Warriors.

As Super League VI champions, the Bradford Bulls played against 2001 NRL Premiers, the Newcastle Knights in the 2002 World Club Challenge.

Vagana played for the Bradford Bulls at prop forward in their 2003 Super League Grand Final victory against the Wigan Warriors.

Vagana played for the Bradford Bulls from the interchange bench in their 2005 Super League Grand Final victory against the Leeds Rhinos.

A destructive tackler and strong runner with the ability to off load the ball, Vagana rarely missed a game for the Bradford Bulls and became one of the most popular players at the club.