Clint McKay has been called up as a spare quick for the Australian team due to Ben Hilfenhaus' shoulder injury ahead of the second Test against Pakistan.
Hilfenhaus injured his left shoulder diving for a ball on the fourth and final day of Australia's 150-run opening Test win at Lord's on Friday.
If the Tasmanian is unable to play, tall South Australian seamer Peter George is set to make his Test debut in the match starting on Wednesday at Headingley.
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A team spokesman said that Hilfenhaus's shoulder was showing signs of improvement.
"(Team physiotherapist) Alex Kountouris has been working with Ben Hilfenhaus for the past 24 hours, he reported he has a sore shoulder from the incident in the Test match but that he was a bit better this morning," the spokesman said.
"Clint McKay is being brought in as a cover player and he will arrive here tonight as a precaution.
"Ben has travelled up with us and is on the improve but the selectors felt it was appropriate to call up Clint."
McKay has been playing for English county side Yorkshire since finishing up his duties with the Australia one-day side in their recent 3-2 series loss to England.
The Australian team travelled to Leeds on Sunday and will train at Headingley on Monday.
Australia will be looking to make it 14 Test wins on the trot against Pakistan this week.
Pakistan will take in their fifth Test captain in 18 months when Salman Butt turns out for the toss in Leeds later this week.
