Belvoir and St Patrick's contested the season's first tie on Saturday.
Chasing the home team's 185, St Pat's needed five runs from the final over to win with number nine Jack Thomas hitting the first ball from David Farrell to the mid-off boundary.
The Eagles brought the field up and Thomas mistimed his shot be be caught at cover.
"It was a bit of a surreal feeling after the game, I was waiting for someone to start celebrating," Belvoir paceman Brad Freake said.
The visitors were 3-125 and 5-161, so they appeared on target to snap a worrying streak after winning only one of their past six games.
Captain Matt Crawshaw admitting his team let it slip.
"Yeah absolutely, it was more mental than anything, we've struggled chasing 180 before, I think once we lost a couple of wickets, yeah mentally (we're) not quite up to it," he said.
The flipside is that after losing 4-9 to fall to 9-170, Patties did well to eke out the next 15 runs to snatch three points.
Thomas scored 11, while number 11 Nick Hynes was unbeaten on seven in the frenetic final stand.
Earlier, Belvoir showed patience in posting its competitive total.
Lachie McMillan stuck 65 runs from 113 balls, with seven boundaries, while the normally aggressive Farrell laboured to 29 from 69 deliveries.
"'Faz' tried to set himself at the start of the day, but they bowled really well," Freake said.
"Once the ball got old, it was a bit hard to get it away."
Farrell and McMillan combined in a 68-run stand for the second wicket, with Freake attacking late to score an unbeaten 27 from just 14 balls, comprising three boundaries and a six.
Kori Stevenson snared his best figures for the season with 5-40.
St Pat's made a solid start with its best batsman this season in Neil Smith and Crawshaw (21) teaming up for 29 runs.
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Left-hander Smith and Nick Flood then took the score to 77 before the latter was superbly run out by Will McCarty.
The Patties still looked in control when Smith and Angus Kilby added 39 for the fourth wicket, but the loss of the final five wickets for 24 curtailed their hopes of a confidence-boosting win.
It was a significant game for St Patrick's after the passing of enormously popular life member Norm Wighton.
The clubs formed a guard of honour before the match.