An inspired spell of bowling from Joshua McDonnell carried Osborne to a comprehensive win at home to Culcairn.
McDonnell's figures of 6-21 from eight overs are the best in the league so far this season and have elevated him to fifth on the bowling charts.
McDonnell quickly had opening bat Vince Chaffey caught for three and he ripped out Culcairn's middle order, dismissing three of them without scoring as the visitors collapsed.
At one stage, Culcairn were 7/38 but they did salvage some respectability by extending their innings into the 31st over.
Jack Retallick faced 70 balls for his 25, with tail-enders Oliver Wood (10) and Zachary Wilson (13) adding some late runs to push Culcairn's total up to 91.
But Osborne were as impressive with the bat as they had been with the ball, Jack Glanvill and captain Ed Perryman immovable en route to a nine-wicket victory.
ALSO IN SPORT
Glanvill was unbeaten on 47 when they reached their target, with Perryman 41 not out at the other end.
Walla proved too strong for Lockhart, winning by 90 runs at Walla.
The home side put up an imposing 5/174 and Lockhart could only manage 84 in their innings.
Simon Odewahn top-scored for Walla with 43 and Kieran McCarthy made an unbeaten 34, with Joel Merkel adding 31.
Walla's Mark Taylor then picked up 4-10 from six overs as Lockhart slipped to a fifth straight defeat.
Elsewhere, Brock-Burrum won by forfeit after Rand was unable to field a team.
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