The confirmed departures of Ken Maumalo, David Fusitu'a, Agnatius Paasi and King Vuniyayawa on 27 July, and the exit last week of forward Leivaha Pulu, leaves the Warriors five players down heading into the their last nine games.
Warriors chief executive Cameron George said getting replacement loan players from other clubs was becoming more difficult.
"It's getting tougher and tougher as the year goes on, as other clubs get injuries, to try to find those loan players" George said.