I must have talked to the same guy in right field who told me outright that, although he had already let 3 strollers in, he would not let ours in... he also stood there and watched me chug a waterbottle that he could not let in. Ironically, he failed to check any of our tickets. I brought the stroller back to the car and we suffered through it. We had a gigantic clear diaper bag though!
To his credit (maybe?), he came and found us in the 6th inning and told us strollers were now being allowed. Thanks.