Victor Espinoza took over the ride when the filly was moved up in class for the Grade I Del Mar Debutante Stakes over seven furlongs on August 28.
The filly started poorly but moved up into third place entering the straight and took the lead inside the final furlong to win by three quarters of a length from Souvenir Gift.
[5] Sweet Catomine was ridden by Corey Nakatani when the filly contested the Grade II Oak Leaf Stakes at Santa Anita Park on October 2 and started the 2/1 second favorite behind Splendid Blended, the five length winner of a maiden at Del Mar on September 6.
After tracking the leaders in the early stages she moved up on the outside to take the lead on the final turn and drew away from her opponents to win by four lengths from Splendid Blended.
"[7] On October 31, Sweet Catomine contested the twenty-first edition of the Breeders' Cup Juvenile Fillies' run that year at Lone Star Park in Texas.
She took the lead well inside the final furlong and accelerated clear of her opponents to win by three and three quarter lengths from Balletto with Runway Model in third ahead of Sis City.
Ridden by Flores (Nakatani was serving a suspension), she started the 1/10 favorite despite conceding at least seven pounds to her four rivals and won by two and a half lengths from Pussycat Doll after taking the lead on the turn.
[10] On March 13, Sweet Catomine, ridden by Nakatani, started the 1/5 favorite against six opponents in the Grade I Santa Anita Oaks over the same course and distance.
Canani had been describing the filly as a Kentucky Derby contender, but in the days before the race she reportedly bled after exercise and suffered from soreness in a foot as well as coming into season.
[12] Sweet Catomine's performance in the Santa Anita Derby caused controversy, as some commentators believed that the betting public had not been made aware of the filly's training problems and that she had been sent for treatment at an Equine Medical Center in Los Olivos three days before the race.
[14] On April 12 the CHRB filed complaints against Martin Wygod and Dean Kerhoff, a transport worker who had driven the filly to Los Olivos after alleging that the details of her departure from the track and return from the medical facility had been "deliberately falsified".