Parramatta forward Junior Paulo has reportedly breached his NRL contract by playing a game of park rugby union.
Paulo wore headgear to conceal his identity and signed in under another player's name as he came on for the final 20 minutes of a third-grade rugby union match between Oatley and Beecroft just 24 hours after an Eels match, according to NewsCorp Australia.
Paulo's brother-in-law Hendry Lees coaches Oatley's third-grade side.
"He certainly took the field," a Beecroft official said.
"They are a team known for stacking but to play a first grade rugby league player is just ridiculous."
Oatley club president Richard Rice confirmed Paulo played in the game said the club would launch an internal investigation into the Samoan international's appearance.
"I believe Junior is the coach's brother-in-law. He was there to support the team and run water for them.
"I'm not sure how they expected to get away with it or why they did it.
"It is certainly going to be heavily frowned upon by both this club and the NSW Rugby Union."
The prop played 44 minutes in the Eels' 20-12 victory over Canterbury on April 30 a day before he lined up for Oatley.
Parramatta have launched their own investigation into the matter and informed the NRL.