Three-year-old Naskra Nick was euthanized after sustaining an injury to his left front leg during the running of the 10th race, a maiden $25,000 claimer at Del Mar Saturday, starting a three-horse spill during the running of the 6 1/2-furlong heat. Naskra Nick was turning for home in the sprint race when he took several bad steps. As he was being pulled up by rider Martin Pedroza, the horse veered out, banging Jason Raj and rider Max Corrales, causing them to fall. Rider Scotty Ziesing and his mount, Chataquos' Chance, were struck by Jason Raj and also fell. Naskra Nick was removed from the track by horse ambulance and subsequently humanely euthanized. The two other horses were up and appeared to have escaped any serious injury. Corrales was taken to Scripps Hospital La Jolla for precautionary X-rays on his left shoulder and right knee. Pedroza and Ziesing both returned to the jockeys' room and reported no injuries. The race was for ages 3 and up. Twelve horses ran in the race won by Valley's Passion. It was second multi-horse incident at Del Mar this week. On Aug. 11, five horses were involved in a chain reaction accident caused by a horse's breakdown that resulted in the death of two other horses and the hospitalization of three jockeys.