In a salary cap sport, not every member of a squad can be a superstar.
Sometimes young players destined for big things don't make the grade at the first attempt, ones who arrive with a huge reputation fail to impress or occasionally things just don't work out.
Here's 17 players - some of them legends at other clubs - who had a relatively brief stint at Rhinos, with varying degrees of success.
How many do you remember?
7. Scott Murrell (2005)
A huge fans' favourite for Hull KR and Halifax and still going this year with Keighley, Scott Murrell is a Rhinos academy product and made one substitute appearance 17 years ago. Picture by Steve Riding. Photo: Steve Riding
8. Shane Millard (2006)
Better known in England for spells with London, Widnes and Wigan, the Aussie hooker played 30 times in his only season at Leeds. Photo: Steve Riding
9. Eric Anselme (2008)
The Frenchn international back scored two tries in as many appearances for Rhinos on loan from Racing Club Albi. Photo: Steve Riding
10. Danny Allan (2008-2009)
A product of Rhinos' academy, the half-back made his debut in the same game as Kallum Watkins and ben Jones-Bishop and featured six times in the first team. Photo: Steve Riding
11. Simon Worrall (2008-2009)
A former Leeds Tykes rugby union player, the forward made 24 appearances before signing for Toulouse. Photo: Gary Longbottom
12. Kyle Amor (2010)
He has won multiple honours with St Helens and was a big favourite at Wakefield Trinity, but the prop made only three substitute appearances for Rhinos after being signed from Whitehaven. Photo: Steve Riding