I can only pay for my NFL season tickets with a Visa card - NOT Mastercard. It must be a special licensing agreement. The funny thing is, my season tickets are for the Browns, which are owned by the Lerner family, which made their money by building the MBNA credit card empire. MBNA and the Browns also share some corporate functions like private jets and cross-promotions. I find it ironic that I can't pay for my Browns season tickets with my MBNA (amtrak) Mastercard.