The late Seattle Slew, who impregnated four of the nine mares bred to him last year in his final season at stud, has sired his last offspring, a filly born Feb. 19 and produced from multiple stakes producer May Day Ninety. Bred by Don and Dana Myers' Swifty Farms, the filly is a half-sister to graded stakes winner Roza Robata and additional added-money winners Burger Day and Go Underground. May Day Ninety (by Alydar) is booked to Swifty stallion Crown Ambassador. Swifty is located near Seymour, Ind. This filly is the last of the Seattle Slews, and all four have been fillies.