Invested Prospect remained undefeated with an impressive front-running win the $50,000 Seattle Stakes for 3-year-old fillies at Emerald Downs on Sunday. Breaking sharply from the rail with Juan Gutierrez aboard, Invested Prospect ($9) quickly opened up a clear lead in the 6 1/2-furlong sprint.  She wasn’t pressured while posting interior fractions of 21.99 and 44.12 seconds, held a five-length advantage at the eighth pole, and was never threatened by B C Z Middleton, who rallied to finish second. The winning margin was 2 1/2 lengths. Find Joy finished another 2 1/4 lengths back in third. The final time was 1:14.87. Invested Prospect, a daughter of Abraaj, is trained by Blaine Wright. Invested Prospect went into the race undefeated in two starts as a 2-year-old.