"Paddy has a bit of a strained muscle on his side," Warnock said. "We don't actually know [how serious it is].
"It could be four weeks, it could be six weeks or two months. The other lad [Murphy], four to six weeks. Paddy got injured last week and we asked the Premier League if we could sign an emergency keeper.
"They talked about it for two days and then told us that we had to bring back a lad from Boreham Wood who has never played in the reserves, who we gave a free transfer to [but retained on a non-contract basis].
"If not, then we had to play a 17-year-old that has not played a reserve game yet, which I think is absolutely scandalous not to get any help.
"I think common sense [should have prevailed]. If you look at what happened last year with Man City and Arsenal [when they wanted emergency loans], this is not in the same league.
"We genuinely lost two keepers and have Radek, who has had a permanent problem all season and only played two reserve games, yet the Premier League cannot [help us].
"That is their final decision. It is in stone with the Premier League."