Rookie V8 Supercar driver Jack Perkins faces an uncertain future, pulling out of the remaining two series races because he is struggling with type one diabetes.
Perkins, who drives for the Jack Daniel's Racing team owned by his father Larry Perkins, will sit out the rest of the year with Carrera Cup racer Marcus Marshall handed the seat for the final events at Symmons Plains (Tasmania) and Phillip Island.
It has been a difficult debut for 21-year-old Perkins, he sits a lowly 49th in the series pointscore with an 11th place in race three at Queensland Raceway his only points of the year.
But the racer with impeccable pedigree is hopeful of overcoming his health concern and racing again.
"It's a big disappointment for me, but you have to face these challenges in life," Jack Perkins said.
"If I can't perform consistently at my best then standing down becomes the only option in such a competitive environment.
"As to what happens next year is a bit of an unknown at this stage, but plenty of advances are being made on the diabetes front so I am optimistic that I can resume racing in the near future."
Team owner Larry Perkins said the decision for his son not to race was Jack's, but he was confident Marshall would slot into the Holden team nicely for the rest of the year.
"It's unfortunate for Jack in that he has been recently diagnosed with diabetes type one and that has affected his track performances to some degree," said Larry Perkins.
"It was his decision to stand aside and let Marcus have a go in Tasmania this weekend.
"Marcus was an obvious choice as he showed plenty of potential as an enduro co-driver for us at Sandown and Bathurst this year. He fits in well with the guys and I'm sure he'll do well."
Marshall, who has been a journeyman in recent years jumping from Champ Cars to V8s and now the Porsche Carrera Cup series, said he was looking forward to donning the black race suit this weekend.
"I'm glad of the opportunity despite the unfortunate circumstances with Jack and hope to do a good job for the team," he said.