Bemused Team Northumbria boss Paul Johnson is counting the cost of a defensive horror show after his side's FA Vase campaign faltered at the first hurdle.
Hosts Crook came away with a 4-2 win as the wheels came off TN's bright start to the season.
And Johnson has vowed to ring the changes at STL Second Division leaders Guisborough on Wednesday - after bidding to sign two new defenders.
"Crook had four chances and scored four goals thanks to some awful defending," said Johnson.
"But we missed a host of chances ourselves and I can't believe this is a game we lost. We must have enjoyed 90% of the possession but we shot ourselves in the foot."
Team Northumbria proved last season's promotion was fully deserved after kicking off their debut North One East campaign with a thumping win in Carlisle.
The hosts were humbled 41-19 as the league's new boys picked up a bonus-point win to start the new campaign in style.
And delighted rugby chief Steve Bates said: "It was a great performance. The boys were up against a big pack but they stayed strong and played some good rugby.
The most successful franchise in British Basketball League history will be based at the country’s newest indoor arena in a move guaranteed to take North East basketball to the next level.
Newcastle Eagles have announced their new home will be Northumbria University’s £30m Sport Central complex.
Fabulous Flournoy’s title-winning roster will play out of the venue’s 3,000-capacity indoor arena – home to this month’s Eurobasket qualifier between Team GB and FYR Macedonia.
And the move further strengthens a partnership which has seen the Eagles work closely with Team Northumbria’s EBL men’s and women’s basketball squads for several seasons.
Northumbria University’s new Sport Central home was opened by Great Britain men’s basketball team in exhilarating fashion as they beat Macedonia 104-96 in overtime.
Northumbria's new home bore witness to a tight and exciting game which needed a stunning Luol Deng three-point shot to send the game into overtime.
From then on GB never looked back and dominated the extra period to make it two wins out of two in qualifying for Eurobasket 2011.
Head coach Chris Finch said: “Even though we were behind at certain points in the game and gave up our lead I felt we mostly controlled the game.”