It's authentic in my opinion. The "g"'s are spot on. Hopefully others can help you out.
ps: I've seen others that look just like this, I would ask the seller where he/she personally obtained it maybe it's the same one that I've seen circulating around? Hope this helps. -Mike
Thanks Mike, I was going to ask her some questions but when I looked at her history, she had none. She is a "new" member and has zero feedback so I'm going to pass on this one. She also has another ball for sale signed by Cal Ripken, Jr. Red flags are popping up everywhere in my head so I'm going to leave it be.
Thanks ! She actually answered me and said it came from her Dad and then asked what a COA was and that she was new to this. I'm still leaving it alone though.