Hucknall's inspired Sunday form
When the pair came together, title-chasing Hucknall had slid to 81 for five, despite 26 from opener Alex Pavier.
But they set about the visitors' bowling in a sixth-wicket stand worth 89 in 14 overs.
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Hide AdCarden cracked 68, including one six and six fours, while Pearson made 37, including six boundaries.
The partnership turned the match on its head and enabled Hucknall to post a fine total of 221 for eight from their allotted 40 overs.
New Zealander Anthony Timpson also added 25 and no fewer than 138 runs came from the final 20 overs.
Mansfield and Pleasley's reply never got off the ground especially after losing the top three in their order inside the opening five overs.
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Hide AdGordon Pearson (three for 21 in nine overs) removed them all and was backed up by Timpson and Alan Pearson, both of whom collected a couple of wickets.
By the 29th over, Hucknall had the visitors on 73 for eight, despite 23 from Mark Revill.
But then tailender Jonathan Cox (24 not out, five fours) led a bout of defiance that prevented the home team claiming an outright victory.
An unbroken ninth-wicket stand of 34 saw Mansfield and Pleasley finish on 107 for eight.