[{"Performer":"Oakland Athletics","URL":"MLB\/Oakland-Athletics-Tickets"},{"Performer":"Oakland Raiders","URL":"NFL\/Oakland-Raiders-Tickets"},{"Performer":"Off-Road Stadium Super Trucks","URL":"Racing-Truck\/Off-Road-Stadium-Super-Trucks-Tickets"},{"Performer":"Ohio Bobcats","URL":"Volleyball-College-Div-I-A-and-Div-I-AA\/Ohio-Bobcats-Tickets"},{"Performer":"Ohio State Buckeyes","URL":"Hockey-College-Div-I-A-and-Div-I-AA\/Ohio-State-Buckeyes-Tickets"},{"Performer":"Oklahoma City Redhawks","URL":"Baseball-Minors-AAA\/Oklahoma-City-Redhawks-Tickets"},{"Performer":"Oklahoma City Thunder","URL":"NBA\/Oklahoma-City-Thunder-Tickets"},{"Performer":"Oklahoma Sooners","URL":"Tennis-College-Div-I-A-and-Div-I-AA\/Oklahoma-Sooners-Tickets"},{"Performer":"Oklahoma State Cowboys","URL":"Hockey-College-Div-I-A-and-Div-I-AA\/Oklahoma-State-Cowboys-Tickets"},{"Performer":"Old Dominion Monarchs","URL":"Hockey-College-Div-I-A-and-Div-I-AA\/Old-Dominion-Monarchs-Tickets"},{"Performer":"Olympique Lyonnais","URL":"Soccer-Spanish-Primera-Division\/Olympique-Lyonnais-Tickets"},{"Performer":"Omaha Storm Chasers","URL":"Baseball-Pacific-Coast-League-PCL\/Omaha-Storm-Chasers-Tickets"},{"Performer":"Orange Bowl","URL":"Football-College-Div-I-A-and-Div-I-AA\/Orange-Bowl-Tickets"},{"Performer":"Oregon Ducks","URL":"Tennis-College-Div-I-A-and-Div-I-AA\/Oregon-Ducks-Tickets"},{"Performer":"Oregon State Beavers","URL":"Basketball-College-Div-I-A-and-Div-I-AA\/Oregon-State-Beavers-Tickets"},{"Performer":"Orlando City","URL":"Soccer-Other\/Orlando-City-Tickets"},{"Performer":"Orlando Predators","URL":"Football-AFL\/Orlando-Predators-Tickets"},{"Performer":"Ottawa Senators","URL":"NHL\/Ottawa-Senators-Tickets"},{"Performer":"Outback Bowl","URL":"Football-College-Div-I-A-and-Div-I-AA\/Outback-Bowl-Tickets"}]