These are not the worst players to feature for the club, some of them had glittering careers elsewhere and one even features on both lists.
But - for reasons including injuries, homesickness, bad luck or in some cases because they weren’t very good - they didn’t make the impact they or the club would have wanted in blue and amber.
For Rhinos’best 21 Super League signings, click here.
1. Nathan Picchi (1996)
A Kiwi who had played for New Zealand Maori, Picchi joined Leeds from Hawkes Bay Unicorns, suffered a shoulder dislocation during his debut - as a substitute - and was released without playing another game. Photo: Steve Riding
2. Sateki Tuipolotu (1996)
The full-back had an illustrious rugby union career, playing in three World Cups for Tonga, but was less successful in the 13-a-side game, scoring one try and two goals in a brief, nine-game spell with Rhinos. Photo: Steve Riding
3. Paul Bell (2000)
An Australian centre, Bell played in Australia for Cronulla, Western Suburbs, Western Reds and Melbourne Storm before joining Leeds. He dislocated a shoulder in his fourth game for Rhinos and didn’t play again. Photo: Steve Riding
4. Bradley Clyde (2001)
The world's best loose-forward of his generation, Clyde - an NRL Hall of Fame member - was good when he played, but injuries limited him to only 15 games in his single season with Leeds. Photo: James Hardisty
5. Brett Mullins (2001)
A brilliant full-back with Canberra Raiders, New South Wales and Australia, Mullins spent much of his time at Leeds in the treatment room. He scored four tries in 12 games in his only season before, remarkably, returning to Australia and winning an NRL Grand Final with Sydney Roosters. Photo: Mark Bickerdike
6. Ben Walker (2002)
The ex-Manly stand-off, signed as a replacement for Iestyn Harris, scored 12 tries and 119 goals in 27 games for Rhinos so certainly wasn’t a failure, but spent only one season in England. Photo: Tony Johnson