Cup holders Bourne beaten by Bracebridge
Bourne lost their grip on the Winkworth Cup after suffering their first T20 defeat of the season in all competitions on Monday.
Pete Morgan's men had won the Lincs Premier Division T20 competition three times in the past six seasons.
However, hopes of a repeat victory were dashed by Premier Division big guns Bracebridge Heath who won the finals day at Sleaford.
After Grimsby had beaten Boston in the first semi-final, Bourne's bid to reach the final was ended after a six-wicket defeat to Bracebridge.
Bourne had won the toss and elected to bat first and, despite losing Jack Berry early on, Morgan (40) and Sam Evison (27) put on 59 for the second wicket.
Despite both falling in quick succession, the baton was soon picked up by Joey Evison (24) and Carl Wilson (18) as Bourne finished their 20 overs on 150-7.
Andy Carter was the pick of the Bracebridge bowlers with 2-31 from his four over spell.
Bourne were soon on top of the Bracebridge reply as Sam Evison had Paul Cook caught by Colin Cheer for just five.
Cheer then sent Vikram Atri packing first ball, courtesy of a Tom Dixon catch, to leave Bracebridge on 13-2.
However, a 57-run partnership for the third wicket between David Whapplington and Kit Spence (40) brought Bracebridge back into the contest.
Carl Stubbs then struck 33 off just 28 balls with Whapplington unbeaten on 52 as Bracebridge past the Bourne total with 11 balls to spare.
Bracebridge then defeated Grimsby by 14 runs in the final despite being dismissed for 115.
Grimsby, though, could only muster 101-8 in their reply.