An inspired bowling spell from Samit Patel helped Notts Outlaws beat Glamorgan by 87-runs in the final of the YB40 at Lord's.
Patel tore the heart out of Glamorgan's middle order during a wonderful spell of spin bowling, which included three wickets for four runs in just nine balls.
Full scorecard and as it happened
Glamorgan were progressing nicely at 108/2 in pursuit of a strong Notts target of 245, with Chris Cooke and Jim Allenby putting on 66 for the third wicket.
But Patel - controversially left out of the England one-day set-up of late - turned the tide inside two overs, bowling Cooke and Allenby with almost perfect deliveries, which turned sharply down the slope to knock the off stump.
Glamorgan's most experienced batsman Murray Goodwin was the third man to depart, trapped LBW, as Notts moved into a position of superiority which they never let slip.
Patel's performance outshone that of England's premier spinner Graeme Swann, who was underwhelming with the ball, while Stuart Broad flattened the tail to finish with figures of 3/29.
Captain Chris Read was the star for Notts with the bat, one of nine internationals in a side which on paper seemed to have little to fear from a Glamorgan side languishing in the lower reaches of the LV= County Championship's second tier.
But after his opposite number Mark Wallace won the toss and inserted Notts, they seemed in jeopardy after collapsing from 52/0 to 90/4 under pressure from 20-year-old off-spinner Andrew Salter (2/41) and veteran fast bowler Simon Jones.
Jones rolled back the years with a fine spell of fast bowling, delivering eight hostile overs on-the-bounce, and picking up the prize wickets of Alex Hales and James Taylor in the process.
In his last ever List A match, the 34-year-old received a standing ovation from Notts, Glamorgan and neutrals alike as he took his cap.
By then however, the key moment in the match had already taken place, when Gareth Rees dropped David Hussey on three when the Australian batsman slapped a Salter delivery low to mid-off.
Hussey (42) and Read ( proceeded to put on 99 for the fifth wicket at a good rate to rescue the innings - Read reaching his half-century with a six over long-on off Wagg.
Hussey was run out next ball, but Swann and Mullaney both chipped in with late cameos to take Notts to 244/7 in their 40 overs.
Glamorgan's commitment in the outfield - particularly from 35-year-old Dean Cosker - was outstanding and exemplified the attitude which has carried them beyond expectations in this competition.
But in the end Notts had too much from the Welsh county, and the Trent Bridge side celebrated their first one-day trophy since 1989 in front of jubilant support in the Edrich Stand.