Central Coast captain Alex Wilkinson apologised to fans after the Mariners were steamrolled 5-1 by a ruthless Brisbane Roar at Bluetongue Stadium on Sunday.
The Roar extended their unbeaten run to an A-League record 14 matches with another brilliant performance to move the six points clear atop the competition table.
Mariners coach Graham Arnold declared the Roar easily the best team in the league after the loss, saying they couldn't be caught in current form.
The result equalled the Mariners' previous worst loss, at home to Sydney FC in season one, and Wilkinson was livid the fourth-placed side had missed a chance to make ground on the frontrunners.
"Terrible, just not good enough," Wilkinson said.
"I think we went the first 10 or so games conceding only seven or eight goal and now eight in two games, so nowhere near good enough, especially at home.
"On behalf of all the players I apologise to the fans tonight."
With both sides playing their fifth game in almost two weeks, there were little signs of fatigue from the visitors, who impressed from the start with their slick, hi-tempo passing.
A double to in-form Costa Rican striker Jean Carlos Solorzano inside 11 minutes got the visitors off to a flier before Mitch Nichols made it 3-0 before halftime.
Arnold made two changes at the break and substitute Adam Kwasnik pulled one back for the Mariners in the second half.
But Reinaldo and a Wilkinson own goal inflicted more misery on the 5858 home fans, before striker Daniel McBreen was shown a second yellow card in the dying seconds to complete a horror afternoon.
The Roar surpassed the unbeaten run set by second-placed Adelaide earlier this season, leaving coach Ange Postecoglou proud as punch.
"I think it's great for the club, .. it's fantastic for everyone involved in the club because it hasn't been an easy 14 days," Postecoglou said.
"... We haven't had a lot of opportunity to sit back and reflect on that and we probably won't until the end of the year, but it's one of those things, it's a very difficult league to go undefeated because it's such an even league.
"We don't want it to end there though, we want it to keep going as long as possible."
The Mariners' loss was compounded by a calf injury to striker Matt Simon, leaving him likely to miss Saturday's clash with Sydney FC.