In case you haven’t noticed, your game ticket on June 6 is double the fun. Former American Idol winner Jordin Sparks will perform a post-game concert on the field. Anyone with a game ticket to the Saturday, June 6 evening game is invited to stay for the concert after the A’s take on the Baltimore Orioles. Visit oaklandathletics.com/concert for more info, but what more do you really need to know besides: GO, STAY, ENJOY!?