Bond University have kept alive their chances of pushing into the Queensland Premier Rugby top four but their 48-31 win over Souths came at a cost, with centre Corbin Kiernan breaking his leg.
After dislocating his shoulder in round 3, Kiernan was making his Hospital Challenge Cup return and scored Bond's first try after being among the best on ground in the opening stages.
But he then suffered a badly broken leg, undergoing surgery on Sunday to repair a broken tibia and fibula.
The round marked the return of several Queensland Reds players to the competition, including Bond's Gav Luka and Teti Tela and Souths centre Chris Feauai-Sautia, who played close to a full game for the Magpies and was among the first players on hand to check on Kiernan.
Winger Sefa Naivalu played his first Premier Rugby match for North in their narrow loss to GPS, while fellow Reds flyer Jock Campbell scored for UQ in their 22-19 win over a resurgent Sunnybank.
Souths' loss pushed them out of the top four, with Easts moving into fourth place after their 24-22 win over Wests, whose finals push has likely come to an end with the loss.
Bond University 48 - Souths 31
Easts 24 - Wests 22
GPS 21 - Norths 16
University of Qld 22 - Sunnybank 19
Cam Clark scored a try for Norths as the Shoremen notched an upset over Warringah in Will Miller's 100th game.
There were plenty of Waratahs faces in the mix, with Rory O'Connor and Maclean Jones both playing for the Rats, while 2019 Reds debutant Seb Wileman also ran out for the Warringah outfit.
Pat Tafa started alongside Miller, Clark and Hugh Sinclair for Norths with Andrew Tuala coming off the bench.
Rookie NSW 10 Will Harrison came off the bench for Randwick and put in a solid shift in a tough 34-19 loss to Souths.
Rebels prop Matt Gibbon was yellow-carded early in the piece while Junior Wallabies hooker Joe Cotton scored a try for Souths, with the pair playing alongside NSW's Jed Holloway and Sham Vui and Brumbies playmaking prospect Bayley Kuenzle.
Junior Wallabies pro Angus Bell started for Sydney Uni with Harry Johnson-Holmes coming off the bench in a big win over Western Sydney.
Gordon continued their winning run with a victory over West Harbour, with Junior Wallabies back Joey Walton nabbing a double for the Highlanders.
Manly 24 - Eastwood 40
Northern Suburbs 25 - Warringah 10
Randwick 19 - Souths 34
Sydney Uni 38 - Western Sydney 7
Gordon 46 - West Harbour 12
JOHN I DENT CUP
Junior Wallabies lock Nick Frost played at no. 8 for Queanbeyan in a tight loss to Royals.
Frost's fellow Junior Wallabies forward, hooker Lachlan Lonergan,started for Vikings in a dominant 66-5 win over Easts
Gungahlin were the other winners in round 13, edging out Uni-Norths.
Queanbeyan 14 - Royals 23
Easts 5 - Vikings 66
Gungahlin 26 - Uni-Norths 20
Box Hill were the biggest winners of the weekend, beating out Footscray 67-17.
Melbourne beat out Melbourne Uni, while Harlequins and Power House also took bragging rights last weekend.
Melbourne 38 - Melbourne Uni 12
Moorabbin 17 - Harlequins 36
Power House 31 - Endeavour Hills 21
Box Hill 67 - Footscray 17
FMG PREMIER GRADE
The FMG Premier Grade split into two divisions last weekend, with the top sides going into the Premiership division.
Wests enjoyed the most comfortable win of the weekend, in a 55-15 victory over Wanneroo.
Nedlands beat out UWA and Cotteslow cruised to a defeat of Associates.
Wanneroo 15 - Wests 55
Nedlands 28 - UWA 10
Associates 15 - Cottesloe 31
COOPERS PREMIER GRADE
There were some big wins in the Coopers Premier Grade on the weekend with Burnside, Woodville, Barossa, Brighton and Onkaparinga in the winner's circle.
Burnside 71 - Southern Suburbs 5
Woodville 36 - Adelaide Uni 24
Barossa 19 - Elizabeth 17
Brighton 33 - Old Collegians 19
Onkaparinga 76 - Port Adelaide 35a