Champion trainer John Size’s arsenal of sprint stars has been further bolstered with Group One winner D B Pin and Group Two winner Beat The Clock returning to trial for the first time this season.

D B Pin is coming back from a tendon injury he suffered in March, missing Dubai’s Golden Shaheen in the process after Size withdrew him the day before he was due to fly when he noticed something wrong with the gelding.

Last season’s Centenary Sprint Cup winner was given a comfortable hit out in the trial on Friday morning by jockey Keith Yeung Ming-lun, where he raced on the speed throughout before being beaten a half-length by Quadruple Double.

The usually reserved Size, said he was happy with the six-year-old’s work following the trial.

“D B Pin has had a rather long time off but this morning he seemed to just pick up where he left off,” he said.

“He seemed to do everything normal, as he normally would do if he was in full training, he’s a bit big and he hasn’t done too much work but today he was fine.

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“I wouldn’t expect him to do anything else than what he did and I am happy with that.”

Size said he expects both D B Pin and Beat The Clock to trial again before returning to the races on November 18 in the Group Two Jockey Club Sprint (1,200m).

Beat The Clock, ridden by fellow Australian Sam Clipperton settled closer to the rear of the field before running on strongly under a tight hold.

Such is his consistency, Beat The Clock is yet to finish out of the placings in his 15 career starts, including being beaten in three Group One’s last season by less than a length combined.

The return of the D B Pin and Beat The Clock means Size is set to take a four-pronged attack into next months Jockey Club Sprint with last start winner Hot King Prawn and last seasons Group One Chairman’s Sprint Prize winner Ivictory also on the path to the Longines Hong Kong International Races in December.

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Size said he was yet to find anything wrong with Ivictory after he flopped last week as an even money favourite in the Group Two Premier Bowl (1,200m).

The son of Mossman was all the rage heading into the race after running a strong second behind Hot King Prawn earlier in the season, but weakened out badly to finish last in a career-worst performance.

“We can’t find anything. I don’t have an explanation,” Size said.

“The horse’s health and soundness, there doesn’t seem to be anything wrong.

“Plenty of horses go to the races and don’t do their best, otherwise we wouldn’t have an industry if they all ran the same every week.

“He will trial, probably on [November 9] and then get him back to the races but I am not expecting to find anything, he seems normal.”

Despite Clipperton riding Beat The Clock on Friday morning, he looks set to keep the prized ride on Hot King Prawn for now after his victory last week, with Size saying he didn’t expect there to “be too much change” in the riding ranks.

Karis Teetan chooses Mr Stunning over Hot King Prawn for sprint features

Karis Teetan had secured the ride on the up-and-coming star at the start of the season but decided to honour a commitment to partner the Frankie Lor Fu-chuen-trained Mr Stunning instead.

With Zac Purton likely to ride Ivictory again, it leaves opportunities open for both D B Pin and Beat The Clock, with Olivier Doleuze and Joao Moreira riding them last season.