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The North Taieri trainer took the 7yr-old gelding into his stable in late February this year and is yet to taste success.
Straitothepoolroom, by No Excuse Needed out of Kirkberg, has had eight wins from 58 starts for $79,475 in stakes.
His first two wins were with the Matamata stable of John Sargent, and the last six for John and Karen Parsons.
Straitothepoolroom's last win was in a 1360m open handicap at Ascot Park on February 18.
He had a fresh-up fifth in a rating 85 1200m at the Otago meeting on Melbourne Cup day.
Today's race is the same rating and distance. Straitothepoolroom has won twice over 1200m.
"He should go all right," Prince said.
"He might be a race away [from top form]. He's a fat wee bugger and takes a bit of work."
Jamie Bullard has the ride. The experienced jockey is closing in on a career milestone - he has 943 wins.
Fellow Taieri trainers Shane and Brian Anderton will be hoping Powder Creek can improve on her last-start third at Winton last week.
The 6yr-old mare has had three wins from 27 starts ($18,212). Her last win was over 1200m at Wingatui on April 12.
She races over 1600m in a rating 65 again today.
"She has trained all right since our last run," Shane Anderton said.
"She just gets back in the field a wee bit so she'll want a bit of luck to get around that. But she has been finishing races all right."