Based on your son's current height and weight, we would recommend getting the 2018 Easton Ghost X -10 USA Baseball Bat: YBB18GX10 in a 30 inch model. With that said, this bat is no longer legal in a 30 inch length. If you feel his current 29/19 bat is too big though then there is certainly nothing wrong with dropping down to a 28/18.
Correct. The only size of the 2018 Easton Ghost X -10 USA Baseball Bat: YBB18GX10 to be banned by USA Baseball was the 30" / 20oz.
Claims for that banned model can be sent to GhostReturn@Easton.com, or customers can call them at 1-844-531-7079. As far as we are aware, customers need to provide a proof of purchase, then Easton is sending a free shipping label for them to send the item back. Once they receive it, they will send the customer a voucher for Easton products. We cannot confirm the voucher amount at this time, but it will be at least the amount the customer paid originally for the item.