Are these autos authentic?

These cards come from a collection that I bought from a local guy who used to go to card shows. Do they look legit and should I get them slabbed?
Thanks
Matt
Warren Spahn

Bill Mazeroski
Thanks
Matt
Warren Spahn

Bill Mazeroski

0
Comments
As for slabbing, neither is a high dollar auto so I'd do it on a $10 special if you really want them done but if for resale the cost of slabbing will seriously cut into any potential profits. Both are prolific signers and very easy to find for sale.