Kent Spitfires lost by four wickets to Somerset in the Metro Bank One-Day Cup in Canterbury on Sunday.
Tom Lammonby hit 102 from 104 balls as the visitors chased down Kent’s 269-9 from their allocation.
Jack Leach returned 2-37, which included both Denlys in three balls.
Jaydn Denly – batting for only the second time with uncle Joe – was Kent’s highest scorer with 65 and the pair put on a 97-run stand for the second wicket.
Denly Jr took 2-41 but Somerset never really looked in danger and they clinched the win with 5.3 overs to spare.
Kent’s chances of qualifying for the quarter-finals were almost non-existent but a very healthy Bank Holiday crowd of 2,500 still attended the club community day at The Spitfire Ground.
Bowler Michael Cohen said: “We lost so, obviously, we were a bit off the pace.
“Credit to Somerset, they played well. They were really restrictive with the ball.
“I admired our determination – we kind of stuck at it the whole time, which is admirable – and I appreciate those things.”
The hosts had elected to bat but lost Ben Dawkins when Jake Ball (2-51) had him caught behind for just five.
The Denlys fought back but both went to Leach in the space of three balls. Uncle Joe was the first to go for 39, caught by Lammonby off his former England team-mate Leach, and Jaydn was almost immediately caught and bowled.
Jack Leaning and Harry Finch responded with the next highest partnership of the innings, putting on 54 runs, before Leaning went for 19 when he lofted Lewis Goldsworthy (1-34) to Tom Rew.
Finch was run-out by James Theedom and Ben Green for 48 and debutant Olly Curtiss went for just one, caught off Lammonby (1-47) by Leach.
Corey Flintoff gave Kent something to defend with a run-a-ball 28 and Fred Klaassen hit successive sixes in the last over, but an inexperienced Spitfires side looked second-favourites at halfway.
Somerset eased to 62 without loss before Mo Rizvi (1-59) bowled Archie Vaughan – the son of ex-England captain Michael Vaughan – for 28.
Jaydn Denly gave Kent a glimpse when he caught and bowled Goldsworthy for 43 and Cohen (2-59) conjured a beauty to get rid of James Rew for 16, but Lammonby creamed Cohen through point for four to reach three figures.
Although Cohen subsequently bent back Lammonby’s stumps, by then, Somerset only needed 67 runs from 14.4 overs.
Tom Rew holed out to Jaydn Denly for 29 and was caught by Cohen and Josh Thomas played like a man in a hurry, blasting two sixes on his way to 24, before he pulled Klaassen (1-54) to Flintoff.
But with just 12 runs needed at that stage, Fin Hill and Ben Green were able to bide their time before the latter hit Jaydn Denly back over his head for four to level the scores.
The winning single came when Green skied the same bowler and Ekansh Singh spilled a tough chance.
On the debut of 18-year-old Curtiss, who has played in the Kent League Premier Division for St Lawrence & Highland Court this summer, Cohen said: “He has come back from a long-term injury so I’ve got a soft spot for him.
“Obviously, I’ve been around him quite a bit.
“It was a real privilege to be on the field with him – and he will go far.”
Spitfires will conclude their One-Day Cup campaign against Yorkshire in Canterbury on Tuesday.
