Michael Vaughan now appears to have played his last game for Yorkshire
Yorkshire slumped to a fourth straight Twenty20 Cup loss as, having already missed the quarter-finals, they failed to make next summer's P20 top flight.
With all the fuss over the expected retirement of Michael Vaughan, the Tykes opted to exclude him and recall skipper Anthony McGrath at Headingley.
But, in chasing Derbyshire's 164-5, in which Wavell Hinds hit an unbeaten 49 and Garry Park 42, Yorkshire folded.
Jake Needham took 4-21 as the home side were bowled out for a miserable 127.
That meant Yorkshire finished fifth in the North Division, missing the slim chance of a top three finish that would have earned them a place in the first division of next summer's P20.
And, having reached the mid-competition break in second place behind North Division leaders Lancashire on 4 June with four wins from their first six games, the Tykes' sudden fall from grace has been unexpectedly abrupt.
Not even the return of McGrath, after three games out with a whiplash injury suffered in a car accident a week ago, could stop the rot.
"Anthony was not in the original squad," said Yorkshire chief executive Stewart Regan. "But he came through a late fitness test and it was decided the captain was needed for such an important match with so much at stake."
But McGrath was unable to change Yorkshire's flagging fortunes in what is turning into a dismal season.
There was little evidence of the collapse to come as openers Andrew Gale and Jacques Rudolph reached 42-0 inside five overs with a salvo of boundary shots. But, after Gale drove Tim Groenewald gently to Chris Rogers at cover to end an innings of 26 from 14 balls, once again, the rest of the batting crumbled.
Man of the match Needham came on to have Rudolph smartly stumped by Jamie Pipe for 24.
And the rot really set in as six wickets toppled for 26, Needham doing most of the damage with his off-breaks, taking three wickets in four balls early in his opening spell.
Jake Needham told BBC Radio Derby:
"It's my first game in the competition and to make a small impact, even in a dead rubber, is satisfying definitely.
"To get three wickets in the first seven or eight balls is pretty unbelievable and that settled any nerves.
"The first one of Rudolph was my favourite, he's an outstanding batsman and has been for some time and to get him that way was very nice."
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