A massive TAB Breeders Crown weekend kicks off at Tabcorp Park Melton tomorrow night and, with a bit of luck, Tim O’Brien may hammer home a winner or two and continue a promising start to his training career.

The Armstrong horseman will gear up two talented trotters - Big Jack Hammer in the Woodlands Stud Breeders Crown Graduate Trotters Free For All and Hammers Law in the Yabby Dam Racing Breeders Crown Graduate Trot – on the opening night of a huge weekend of the trots.

It will be the first time O’Brien has attended the Breeders Crown as a trainer, having gained his licence this year, but he is no stranger to breaking ducks at Melton.

“My first official winner (as trainer) was with Big Jack Hammer in town, so that was all right,” O’Brien said.

“Both these horses are nice country cup horses, that’s what I’m sort of looking at with them, (but) Breeders Crown is a little bit different, it gets a bit harder there. In these races 90 per cent of the time it comes down to luck.”

The 39-year-old may officially be a novice trainer, but – through dad Mick, brother Danny, partner Brooke Hansen and cousin Leroy – he has been in the industry “all my life”.

“I have worked horses in dad’s name and then Danny and then Brooke for the last 15 years,” he said.

“Then this year Brooke said it’s about time you got your licence.”

The 39-year-old, who trains four horses near Ararat, said he expected Big Jack Hammer and Hammers Law to run well on Friday night for prominent owner Domenic Martello.

He hoped Big Jack Hammer – a The Pres gelding out of Running Pinevale – was about to return to form after a couple of underwhelming runs.

“This is my first prep with him – he is a lovely horse. On ability he is as good as anything we have had here trotting wise,” he said.

“His first two runs back were really good, then he did a heap of work in his third run and put in a shocker at Maryborough.

“He looked a little bit tight walking off to the washer so we got his stifle (joints worked on) and since then he’s been really good.”

He said the plan was for Big Jack Hammer to tackle the bigger races as a six-year-old over summer.

“I am fairly confident I have got him right now. Just fingers crossed that everything goes right with him.”

The Breeders Crown weekend will continue on Saturday with a huge card featuring eight Group 1 races, including the two-year-old and three-year-old Breeders Crown finals.