Teenage paceman Cameron Green only packed one pair of white trousers for his trip to Hobart, expecting to be No.13 on Western Australia's team list.
Instead the 17-year-old made his Sheffield Shield debut at Bellerive Oval on Friday and took 5-24 from his 8.1 overs, helping to dismiss Tasmania for 198.
"I've only got one pair of long white pants so I'll have to find another pair," Green said at stumps, admitting he was surprised by his inclusion in the squad, let alone the XI.
Overcoming some early jitters including a no-ball in his first delivery, Green's confidence grew and he found good movement on the fresh pitch.
The breakthrough came at the start of his second spell when he trapped Tigers opener Jordan Silk lbw and then two balls later claimed the scalp of replacement batsman Beau Webster for a duck.
"(The first wicket) was a bit of a blur to be honest, but pretty amazing," Green said.
Fellow paceman Simon Mackin also caused pain for the hosts, his four victims including Tasmania's captain and sole top-order standout George Bailey, who added 75.
After a disastrous start which saw them fall to 2-2 by the fourth over, the Tigers failed to bat for two sessions and lost six wickets for 45 runs at one stage.
In reply the Warriors were 1-149 at stumps thanks to half centuries by openers Jonathon Wells and Cameron Bancroft, who remains 58 not out, with fellow batsman Hilton Cartwright unbeaten on 10.
"The whole WA team had a really great day finishing on top and hopefully we can secure the points," Green said.
Tasmanian coach Dan Marsh said WA's choice to bowl first after winning the toss gave them a vital advantage.
"The wicket dried out a bit and the ball stopped swinging later on," he said of the change in conditions between Tasmania's innings and when Western Australia made it to the middle.
"As we know here, if you can bowl well early on day one you can make inroads whilst there's a bit of moisture in the wicket and they did that."
