The alleged stabber of three men at a west Sydney rugby league match has become the second man charged over the attack.

Ratu Nanovo, 19, was charged with three counts of wound with intent.

The incident unfolded after an under-20 community game between Penrith Brothers and Wentworthville Magpies in North Parramatta on Sunday.

Brothers player Bradley Wayne Middlebrook, 20, was sent from the field for a shoulder charge on a Magpies opponent, police said.

Tensions then spilled off the field, with Middlebrook allegedly returning to a nearby vehicle, grabbing the knife and confronting his 19-year-old opponent, and his 16-year-old and 22-year-old cousins who were spectators.

A second man has been charged following the stabbing of three people at a sporting ground in Sydney's north-west on the weekendhttps://t.co/wyoYyoL2PB

— NSW Police Force (@nswpolice) August 11, 2020

Nanovo at this point entered the scene and allegedly used the knife to stab the three males, including the Magpies player in the neck.

Several men fled the scene in a Toyota Aurion and a search led to the arrest of the 19-year-old at a Cambridge Park home.

Nanovo was taken to Nepean Hospital under police guard for treatment to a cut hand, and arrested and charged with three counts of wound with intent after being released on Tuesday.

He has been refused bai,l but is scheduled to face Parramatta Local Court on Wednesday.

Middlebrook has been released on bail  but is expected to reappear in court next week.