How is this jackie certified by JSA
 

I'm pretty confident with Robinson signatures and this is not a Robinson signature. Thoughts?

i think it looks good

From the small scan, it looks OK IMO

^^^ agreed

If it's real it's not a nice one. There's just a lot that seems so wrong to me, such as it being rushed (which he rarely did), and less formation on some letters.

It's not the nicest but it doesn't look off to me either, just not the prettiest.

Your original question was is it Robinson's signature, not "Is it a nice Robinson signature."

I agreed with a previous post that, yes, the signature appears to be Jackie Robinson's.

I think it is authentic but obviously rushed.
I would not buy it because his sig. is not rare and you can certainly find nicer ones easily.