Aiton, Kelly and Collis have joined three other ex-Sharks players in legal action against the club, Fairfax Media states.
The action refers to the period in 2011 when sports scientist Stephen Dank ran a controversial supplements program at the NRL outfit.
Kelly and Aiton are two of five former Sharks players who declined a “doped and duped” deal with ASADA that saw many of their teammates serve a three-game suspension in 2014, and now face a potential two-year ban.
Kelly played 14 games for Cronulla from 2010-2011, Aiton 36 games from 2010-2011 and Collis 24 games from 2010-2011.
The five ex-Sharks players, which includes former Catalans centre Ben Pomeroy, have been served with infraction notices.
The players can either accept the breach, which is likely to be a two-year suspension, or declare an intention to fight the charge and appear before the NRL‘s Anti Doping Tribunal.