Reigning Horse of the Year Atomica drops in class to compete in the $1.14-million Labour Day Trophy feature event at Caymanas Park today, which should be a walk in the park for the four-year-old chestnut filly.

Atomica, who is running for the second time this season, meets a modest field of competitors. She enters this Overnight Allowance race for three year olds and above after not winning since last November.

Atomica is dropping in class after winning multiple Grade One races, including the top-ranked Jamaica Cup, against older, more experienced horses.

In her lone run this season, the Gary Subratie-trained Atomica finished 13th by more than 14 lengths behind I Am Fred in a six-and-a-half furlong (1,300m) on April 8.

Atomica drops to level, which is her right, but she receives weight (five pounds) from both Perfect Brew, who has never won a Grade One race, and Prince Marshall, who appears to be out of shape.

Atomica will win the Labour Day Trophy unless something terrible happens, and even if she loses, which is quite unlikely, it will take something spectacular from the other eight competitors. Atomica will be ridden by Dane Dawkins once more and will weigh 55.0 kg (121 lb).

The Labour Day Trophy is positioned as the eighth event on the nine-race card with a post time of 4:30 pm. First race is at 12:15 pm.

With Atomica, who appears to be an easy winner on paper, the exacta or quinella wagers are likely to be the best option for punters.

Second place could be decided by Sweet Majesty, Perfect Brew, Champion Bubbler, Prince Marshall, and Outbidder.

Sweet Majesty, trained by Edward Stanberry, makes an appearance every now and then with unexpected runs. Sweet Majesty's last three starts were in the class above, and she is expected to run well now that she is stepping down the ladder. Her most recent victory came at this level, when she defeated competitors at 29-1 in a seven-furlong contest on January 21 of this year. If she can repeat that performance, Sweet Majesty will undoubtedly be in contention for second place.

Perfect Brew has been quite consistent, finishing second to Blue Vinyl over one mile (1,600m) on April 21 by more than 10 lengths. Prefect Brew is required to carry 57.0kg (126 lb) but should be able to compete for second place.

Champion Bubbler, a four-year-old American-bred bay filly, did exceptionally well to achieve this level. In her five starts on home turf, the Spencer Chung trainee has never finished lower than second. Champion Bubbler has won three times and finished second twice, and she appears to be the favourite to take second this time around.

Prince Marshall's lone appearance in Overnight Allowance this season, like Atomica's, was forgettable – a 10th-place finish, 35 lengths behind Blue Vinyl, some 24 days ago. Prince Marshall had previously won at this level, although it was on December 17 of last year. Prince Marshall, who will carry 57.0kgs, has the speed to compete in the exotics.