The Stars' bid for a breakthrough BBL title suffered the triple blow when Maddinson (broken arm), Stoinis (ankle) and Worrall (back) sustained injuries in the final round of the Sheffield Shield before the break for the BBL.

Maddinson could miss just two or as many as six weeks of the BBL season after the left-handed batsman underwent surgery on a broken arm on Monday.

The 26-year-old was signed amid much fanfare after a successful stint with the Sydney Sixers.

He made a stunning 162 in his debut innings for Victoria but the Stars are looking for an injury replacement player after he was struck by a bouncer in the second innings of the drawn match against Western Australia at the MCG.

"We've got some exciting talent in the team that will be able to step up but we're obviously canvassing the country for the next batter that could step in," Stars chief executive Clint Cooper said on Tuesday.

"The difficulty with BBL is that by this time of the year all eight teams have their 18 contracted players.

"... Over the next couple of days we'll get more of an understanding of what his recovery period will be."

Any new signing must be Australian, with the Stars' international spots filled by West Indies entertainer Dwayne Bravo and Nepalese spinner Sandeep Lamichhane.

Stoinis suffered ligament damage in a warm-up drill at the MCG.

He was able to bat for WA, with his gallant 85 in the second innings helping to secure a draw, but didn't bowl after he rolled his ankle.

"It was very painful (on Saturday) ... I had a scan and there is a tear in there, but I'm feeling a lot better," Stoinis said.

"I can only only go on how I'm feeling and it's improved quickly.

"I think bowling will be tougher (than batting) but it's on my right side so at least it's not my front foot.

"I'm still confident I'll be alright to bowl."

Worrall broke down on day three of South Australia's draw with NSW and will be assessed when he arrives in Melbourne for the first day of the Stars' pre-season on Tuesday.