PARRAMATTA captain Jarryd Hayne admits he doesn't know how the Eels can bounce back from Monday night's embarrassing loss to Penrith, saying it's the worst he's ever felt after an NRL game.

Hayne said it wasn't the 44-12 scoreline that hurt the most but the fact the Panthers ended their five-match losing streak with an inexperienced outfit.

Winger Travis Robinson and debutant fullback Matt Moylan - neither of whom were even listed in this year's NRL media guide - were instrumental in the victory at Centrebet Stadium, with Robinson bagging a double.

Playmaker Luke Walsh, who was dumped to the NSW Cup a few weeks ago, also stepped up with a dominant performance in the halves.

"It wasn't the score line, it wasn't the loss - it was the players they had,'' Hayne said today.

"Half of them were (NSW Cup) Windsor Wolves players and for us, what we did, was terrible.

"It's not good enough.

"I really don't know what to make of the whole thing.''

Asked whether it was the worst he'd felt after a match, Hayne said: "Yeah I think so, definitely.

"We definitely had the talent last night, we had the experience - we had everything.

"And for our team to have that ... against someone like Penrith - a rivalry, and to play like we did was nothing short of embarrassing.''

Hayne agreed the Eels' heads had been hanging low for a while but was at a loss to explain what needs to be done to turn it around.

"I'm not sure what to do. What do you do?'' he said. "I think the last five years has been awful and that was clear cut last night.

"No one player is just going to turn it around - it's the whole 17. The whole 17 need to step up and take it on board.''

Centre Jacob Loko, who suffered a cork early in the game, said coach Ricky Stuart was yet to speak to the team but said the mood among his teammates wasn't pleasant.

"We haven't spoken to him yet but he'd be feeling emotional about the game last night and so are the boys, they're a bit down on themselves,'' he said.

"But we've just got to stick together and push through these lows.''

In further bad news for the Eels, prop Tim Mannah is expected to spend a number of weeks on the sidelines after suffering a leg injury last night.

He is undergoing scans today.