Watching Alex McKinnon battle a devastating back injury contributed to Darius Boyd's battle with depression, Wayne Bennett says.
The Newcastle fullback yesterday checked himself into a Sydney mental health facility and has been granted indefinite leave by the NRL club.
The club said there was no guarantee the 27-year-old would play again this season.
Boyd has endured a tumultuous fortnight which began with a bizarre encounter with a television reporter.
Last week, Boyd caused A$1500 ($1629) damage to a luxury hotel room in the Hunter Valley after breaking a television, smashing a glass and putting a hole in a wall. He later rang the resort's general manager to apologise and offered to pay for the damage.