Southcity will need to adapt their game plan after confirmation Usaia O'Sullivan will miss the rest of the season.
The imposing centre is a real focal point of their attack, but will be sidelined for a lengthy period after a nasty incident a Laurie Daley Oval on Saturday.
The 27-year-old had surgery hours following the 26-12 win over Junee after dislocating his ankle and suffering a compound fracture in his right leg.
O'Sullivan was caught awkwardly in a tackle in the wet conditions.
"In a tackle I just turned around and saw it going the opposite way," O'Sullivan said.
"I felt it go and was told not to look at it."
Luckily Bulls teammate Simon Parr, who is a paramedic, was on hand to assist.
Bulls coach Kyle McCarthy described it as a massive blow for their premiership hopes.
He is unsure how they're going to replace him, or with who, but hasn't ruled out adopting a different style.
"I've put a little bit of thought into it but I haven't got much idea yet," McCarthy said.
"Whether we change the way we play a bit we will have to work something out a training.
"We've especially relied on him this year with Rosey (Nathan Rose) being out quite a bit.
"We do take a lot of attack there and a lot of teams double up with their defence on that edge to try and combat that and it gives us opportunities on the other side."
Adding to his troubles fullback Jake Dooley, who missed the Diesels clash with a hamstring injury, is on an overseas holiday.
He will miss their next two games while Rose and Nick Skinner have had their seasons plagued by injury.
"It's especially hard when you're missing blokes, plus Rosey and Skin being injured," McCarthy said.
"Hopefully they will be back sooner rather than later."
One bonus is Jack Lyons has returned to the club and will inject some speed to the team.
Southcity takes on winless Cootamundra at Harris Park on Sunday but a much bigger test looms with a clash against Tumut the following week.