The number of players attempting to sue NRL club Cronulla over the 2011 supplements program has reportedly risen to six after three more launched legal action.

Former Sharks Albert Kelly, Paul Aiton and Dean Collis have all been listed for a pre-trial conference on May 17, according to Fairfax Media.

The trio will join Isaac Gordon, Broderick Wright and Josh Cordoba in seeking compensation, while another four players are also believed to be considering similar options.

Kelly and Aiton both recently received infraction notices over the 2011 program, after they both rejected deals from ASADA at the end of 2014.

While the majority of their teammates escaped with a three-game ban after accepting the deal, the pair could now face two years on the sideline if they now accept the breach,

Stephen Dank, who led the program, last week lost a defamation case against Nationwide News over a series of articles in 2013 about his time at the Sharks.

It is now believed he will launch an appeal.