Selorm, who joined the club in 2005, suffered two major injuries, which kept him out of the game for long periods and eventually led to his decision to retire in 2010.
Chief Executive Mick Hogan told the club's official website: "Everyone at Sale Sharks passes their deepest sympathies to Selorm's family and friends at this very difficult and upsetting time.
"Selorm was a very popular young man and a wonderfully talented rugby player. We are devastated to learn about his tragic death and the club is offering our full support to his family, friends and former team mates during this deeply traumatic period."
Selorm retrieved a first class honours degree in Human Biology & Infectious Diseases last year.