Jarryd Hayne has revealed the reason behind his decision toย quit the San Franciso 49ers.

Hayne says he inability to get enough game time was the primary reason behind his shock decision.

โ€œI've played eight games in almost two years,โ€ Hayne toldย The Locker Room podcast.

The former Parramatta Eels star said atย this stage of his career,ย he had to be playing rather than sitting on the bench.

โ€œI need to be getting game time and you just can't get that over there (in the NFL) because of the way it works,โ€ Hayneย said.

โ€œThe offence is only on for a certain amount of time and then there's five other running backs.

"If there was a second division team where I could get those mental reps of being on the field, 100 per cent I'd go back to the NFL.

โ€œI'm at the end of my career where I really (have) just got to get on the field. I just want to be on the field. I've played eight games in two years.

"If I went back there to the NFL it'd be one of those things where I'd be a second or third string guy helping out but not really getting a lot of game time.โ€