Phil Mustard scored an impressive half-century and Graham Onions produced a triple-wicket maiden over as Durham condemned Glamorgan to a third straight Royal London One-Day Cup defeat in a low-scoring game at the SWALEC Stadium.
Despite Durham only able to make 185 in 45 overs after winning the toss, Glamorgan only managed to reply with 133 all out as they went down by 52 runs with 8.5 overs remaining.
On a very two-paced pitch, the main damage to the Glamorgan innings was done by Onions' three-wicket over with the new ball with Jacques Rudolph, who compiled 61 off 99 balls, only one of the top six to make double figures.
Onions, who finished with figures of 4-48, struck to have Will Bragg caught at point, David Lloyd was bowled first ball and Jim Allenby was trapped lbw.
After that wickets fell at regular intervals. Murray Goodwin went lbw playing across the line to John Hastings and that became 53 for five when Chris Cooke was caught behind off England all-rounder Ben Stokes attempting to drive.
Mark Wallace hung around for eight overs but became the sixth man out caught behind off Paul Collingwood, who also bowled Graham Wagg via an inside edge as Glamorgan sank to 86 for seven in the 30th over.
This is one of the most interesting wickets I've seen! 185 is defendable without doubt with our attack!! Let's do this boys!
— Chris Rushworth (@rushworth22) August 8, 2014
All hope went for Glamorgan when Rudolph edged Collingwood behind to leave his side 106 for eight. There was some resistance shown by the last wicket until James Harris was caught at slip off the former England all-rounder, who finished with figures of 4-16 from 7.1 overs.
But at the halfway stage Glamorgan had looked in the driving seat. Michael Hogan led the way with 3-22 with Lloyd recording figures of 4-10 in three overs - three of his scalps coming in one over, and slow left-armer Dean Cosker weighed in with 3-33.
Hogan made an immediate impact by dismissing visiting captain Mark Stoneman with the second ball of the game. He edged a rising ball behind.
Mustard, who reached his 50 from 72 balls, and Calum MacLeod laid down a useful platform.
But after the second-wicket pair put on 101 in 23.3 overs, the Durham innings rather unravelled, losing five wickets for only 30 runs.
Here's a pic of Dewi enjoying our family fun day inflatable bungee pic.twitter.com/vsZEHxEwcD
— Glamorgan Cricket (@GlamCricket) August 8, 2014
The slide was begun by Cosker, who trapped MacLeod leg before, and continued by the return of Hogan after his opening spell of five overs had conceded only seven runs.
Hogan accounted for Mustard and Collingwood in consecutive overs. Mustard was bowled attempting to pull before Collingwood went lbw shouldering arms.
Cosker dismissed Scott Borthwick leg before and then had Keaton Jennings caught behind attempting a reverse sweep.
Stokes put together a typically pugnacious innings, striking three sixes, but on 49 from 43 balls he became Lloyd's first victim caught on the midwicket boundary by Hogan.
It was the start of Lloyd's three-wicket set of six. Two balls later Hastings edged to slip before Paul Coughlin was bowled.
After a brief cameo from Gareth Breese, Lloyd ended the innings when Onions edged to slip.