Retired NRL forward Brett Horsnell is taking legal action against former club Parramatta reportedly over post-playing career mental health problems.

Horsnell argues concussions suffered during his 154-game NRL career has contributed to his ill health, according to reports.

It’s understood he was diagnosed with a brain tumour in 2004, as well as previously undergoing back surgery.

Last year, he spoke of having suicidal thoughts in his retirement.

His case comes as Newcastle is sued by ex-player James McManus in the Supreme Court over the club’s treatment of head knocks throughout his career.

Horsnell played for the Eels, South Queensland Crushers and the Gold Coast Giants and Seagulls between 1989 and 1998.

His matter against Parramatta is set down for a directions hearing in the Supreme Court in Sydney for May 22.

The NRL has been contacted for comment.