Osborne suffered its first defeat in the AFL Riverina Championship when it went down to Mangoplah-Cookardina United-Eastlakes by 25 points at Mangoplah on Saturday.
With the exception of a purple patch in the third quarter, the Ostriches were outplayed by Jeremy Rowe's hungry lineup, falling 11.10 (76) to 7.9 (51).
Matt Rava continued his good form for Osborne in the midfield, while skipper Duncan McMaster was effective in defence before being shifted into the ruck after half time.
Young defender Michael Driscoll also held his own in the last line, despite being under constant pressure.
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Osborne coach Joel Mackie injured his hamstring in the opening five minutes and, with the exception of kicking two goals in the third quarter, was unable to make his mark on the match.
"If you don't turn up to play in this competition, you are going to get rolled," Mackie said.
"We were a little bit off at the start and they're a good side and made us pay.
"I thought we responded really well in the third quarter, but gave them too much of a start."
Young MCUE forward George Kendall was on fire for the victors, while Jack Reynolds won plenty of the ball in the midfield.
Wagga Tigers bounced back from last week's loss with a one-point win over Ganmain-Grong Grong-Matong.
Brothers Sam and Nick Murray were among the Lions' best in the loss.
Leeton-Whitton were too strong for Turvey Park.