It came six days after Will Hayes celebrated the arrival of his first child, Oliver David Hayes, with partner Coco Webster.
With Will adjusting to family life and JD playing football for Euroa, eldest brother Ben was in charge at Flemington and said the quartet of wins capped a memorable week for the family.
"It's a big achievement for Lindsay Park, it's the first time we've had a metro four-timer, so we're very happy and it's a big thrill," Ben said.
"I know Will will be at home super excited and JD would have finished his footy game and he would have been having a bit of fun flicking through seeing all the results.
"Will, JD and I are proud of the whole team."
The tone for the day was set in the opening event when Sneaky Sunrise, a two-year-old daughter of The Autumn Sun who started $3.60 favourite, made it back-to-back Flemington wins under Daniel Stackhouse in the Ken Cox Handicap (1420m).