Nottinghamshire 279 (Haynes 100, O’Neill 59, van der Gugten 4-54, Hadley 4-76) and 311 for 9 dec (Clarke 136, Slater 70) beat Glamorgan 113 (O’Neill 4-24, Hutton 4-33) and 285 (Tribe 85, Patterson-White 3-13) by 192 runs
O’Neill had taken five wickets in the match and played an important role with the bat too, his first-innings half-century helping Nottinghamshire recover from 103 for 6 to 279 all out after being put in on a difficult pitch.
Jack Haynes led that fightback with his first century of the season, matched by Joe Clarke in the second innings, his 136 key to giving Nottinghamshire a commanding lead after Glamorgan had been dismissed for 113.
Glamorgan went into the last day theoretically needing 346 more to win. Surviving 96 overs nine down or fewer was a more realistic target, so losing three wickets in the first five overs of the day was not the kind of start that was needed.
The news that O’Neill would miss the remainder might have been a source of comfort but Ben Hutton and Dillon Pennington, who had combined effectively on the third evening after 52 overs were lost to rain, continued where they had left off.
Pennington struck first, having Kiran Carlson caught behind with a fine ball that took the outside edge of the Glamorgan captain’s defensive bat, before Hutton landed two major blows in the space of nine deliveries.
The bigger of the two came first as Tribe, who had survived a fierce test of his technique and temperament before Saturday’s close, shaped to play square into the off side only to bottom-edge into his stumps.
Wicketkeeper Kyle Verreynne, who had been standing up when Tribe was facing Hutton, went back for Colin Ingram and profited almost immediately as the 40-year-old Glamorgan stalwart could only connect with the edge as he went to drive.
Sean Dickson, the first of twp injury substitutes in the match after Ben Kellaway dropped out on day one, joined Chris Cooke in the middle and the pair mounted some resistance. Had they been able to sustain it beyond lunch, then Glamorgan might have felt they still had a chance of effecting an escape.
But James, on after a brief spell from Josh Tongue at the Stuart Broad End, removed each of them in consecutive overs, Cooke leg before and Dickson caught behind square, both pulling.
To their credit, Glamorgan refused to roll over. Timm van der Gugten and Crane dug in for another hour before the former was leg before to Patterson-White and Crane found another durable partner in Andy Gorvin, who almost made it through 21 overs to tea, only to lose concentration just two balls from the scheduled interval time, dragging on a delivery from Patterson-White to be bowled, the ninth wicket delaying tea just long enough for the left-arm spinner to finish the job.
