Jon Hicks suffered a broken leg after 23 minutes as Bicester lost 44-17 at home to Marlow in Southern Counties North.
Bicester scored tries through 18-year-old replacement wing Pat Truby, with scrum half Steve Risbridger adding four penalties.
In the BB&O Premier Division, Abingdon pulled off a shock 24-17 win at Oxford to ease their relegation fears.
OTHER SCORERS
BB&O Div 1 North: Buckingham 3rd 3, Bicester 2nd 67 (tries Q Eliki 2, S Mats 2, J Willmore, T Edgar, N Bau, P Johnson, D Millward, J Cookson, P Sas; cons Sas 2, Millward 2, Bau 2).
BB&O Div 2 North: Banbury 3rd 20, Bicester 3rd 15 (tries P Miller, A Burrows, C Stone.
Club match: Grove 3rd 31, Oxford Harlequins 4th 47 (tries R Telling 2, S Tyrell 2, T Bell, H Roquet, C Upham; cons J Todd 6).
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