Jun 5, 2008 鈥 By Joe Kleinsasser 鈥 The New York Yankees made news this spring by spending about $50,000 to extract from the new stadium's concrete a David Ortiz shirt planted by a Boston Red Sox-obsessed construction worker hoping to hex his team's arch rivals. 麻豆传媒 sports psychologist Greg Buell looks at the issue of superstition and when it becomes harmful.