He has ridden six metropolitan standard winners before Saturday's Doomben meeting but they had all been at midweek meetings.
San Telmo ($8) was last coming to the 600m but swept around the field to win by 2 3/4 lengths from Shotacross the Bow ($13) in the Des Lambart Memorial Hcp (2200m).
“I was travelling well and when the others decided to sprint I thought I would follow Jeff Lloyd (on Shotacross the Bow). If it was good enough for him to be out wide I figured it was good enough for me,” Murphy said.
“Mr Anderson has taken me along slowly and I think I have had a solid background to be riding in town now.”
“San Telmo has always shown staying potential and now we have got him going there are plenty of options here for him or the Townsville and Cairns Cups,” Laxon said.
“Jackson did a good job and I think he has a real future.”