Jett Hasiuk, a senior representing the Calgary Track and Field Athletic Association in Canada, won the boys 400 meters in 48.91 seconds at the Stanford Invitational at Cobb Track and Angell Field in Palo Alto, Calif.\n<\/div><\/div><\/td><\/tr><\/table>\r\n\t\t\t\t<\/div>\r\n\r\n\r\n\r\n\r\n