"I make no apology for the club's firm policy on player behaviour,'' Edwards said in an Eels statement.
"When a player signs with Parramatta, they acknowledge the high standards of behaviour expected. Our players need to be committed to the club, their teammates, our members and supporters.
"As a club we will continue to strive for excellence and foster a culture of respect, inclusiveness and teamwork.''
Anderson claimed on Channel Nine that the Eels had showed favouritism by clearing Maitua, who is being touted as a future captain of the club.
"I thought he was about to deck me ... so I stood back and hit him first and that's what happened. And then he was out cold on the ground,'' said Anderson.
"It's an NRL player's word against an under 20s player's word. Straight up they're going to pick the NRL player aren't they?''
- AAP