LOUISVILLE, Ky. (AP) — Mystik Dan won the 150th Kentucky Derby in a dramatic three-horse photo finish, edging out Sierra Leone and Forever Young for the upset victory. It was the 10th Derby to be decided by a nose, the closest margin in horse racing. Sent off at 18-1 odds, Mystik Dan and jockey Brian Hernandez Jr. rode the rail down the stretch with a short lead. Sierra Leone and Forever Young from Japan gave chase and pressured the leader to the wire in front of 156,710 at Churchill Downs on Saturday. Hernandez and trainer Kenny McPeek had teamed to win the Kentucky Oaks for fillies a day earlier with Thorpedo Anna. Mystik Dan ran 1 1/4 miles in 2:03.34 and paid $39.22 to win.