Arizona Diamondbacks 1998 Inaugural Season New Era 59Fifty 。THIS MARCH 31, 1998, ARIZONA DIAMONDBACKS INAUGURAL GAME HAT WAS MADE EXCLUSIVELY FOR THE FIRST-EVER DIAMONDBACKS BASEBALL GAME, GAME 1, SEASON 1 OPENING AT THE BRAND NEW BANK ONE BALLPARK STADIUM. IT IS NO. 9840 OF 20000 MADE EXCLUSIVELY FOR BANK ONE AND THE ARIZONA DIAMONDBACKS. THE HAT IS MADE OF DENIUM AND SUEDE. THE HAT HAS NEVER BEEN WORN. IT HAS BEEN KEPT IN A DUST-FREE BAG AND PACKED SAFELY AWAY. IT IS A UNISEX HAT THAT CAN BE WORN BY WOMEN OR MEN. THE INAUGURAL GAME WAS PLAYED AGAINST THE COLORADO ROCKIES.