I've had some heart burn with MLB authentication and the worse was a gray Pedroia jersey I bought in 2009. When I checked the MLB site it stated the jersey was used in a Tigers vs Red Sox game at Fenway. For the longest time I didn't think anything of it until it finally dawned on me that the Red Sox wear white jerseys at home and the gray are away. Luckily I bought the item from a reputable dealer and they contacted MLB to try to get a correction on the authentication. When they couldn't get it corrected I returned the jersey and they refunded me my money. That was the first MLB authenticated item I purchased and it taught me to pay close attention to what they state on their site.