Star of the Seas continued his run of good form winning the opener at Rosehill on Saturday.
The four-year-old son of Ocean Park has been runner-up at his last two starts and was backing up from a run on the same track at the same distance on February 23.
The progressive Chris Waller-trained gelding has proven previously his ability to handle rain-affected going and looked more than comfortable finishing strongly to the line to claim the Catanach's Handicap (1350m) on a Heavy10.
"It was a good effort," jockey Kerrin McEvoy said.
"He had to do it without cover and appeared to handle the ground."
Bred by Trelawney Stud, Star of the Seas is out of Stella Livia and is a three-quarter brother to Spieth.
Star of the Seas was initially entered for New Zealand Bloodstock's 2016 Select Yearling Sale by Trelawney Stud, however a pre-sale x-ray forced their hand to withdraw the colt along with another colt who would go on to win at Group Three level.
"We had two horses going through the sales that same year," Taylor said. "We did our pre-sales X-rays and they both had cysts in their pasterns.
"Between the vets and ourselves we decided that the market wasn't going to accept the X-ray issue. One was The Bostonian and the other one was this horse.
"He (Star of the Seas) went through a trial for ourselves and trialled up exceptionally well under the guidance of Te Awamutu trainer Clayton Chipperfield.
"We sold him on the back of that trial through Phill Cataldo, who bought him for Tony Muollo in Sydney, who is a good friend of his."
Star of the Seas has now had three wins and four placings from seven starts and Waller has confirmed he will now head to the Gr.3 Doncaster Prelude at Rosehill in two weeks, a race that holds ballot exemption for the Randwick showpiece.