It appears to be a very good match.

Does all of the thread look original, consistent and matching when you turn it inside out? I cannot imagine that there are multiple Griffey Jerseys with this unique font spacing so that weighs heavily in your favor.

I only mention this because I was duped on a fabricated photo match. The forger found the unique name plate photo and then forged the jersey to be identical. You almost couldn't tell but the thread color was off the slightest bit. I do not think that this is the case with your Jersey.....Nice find!