Autographed card submission question

I have 2 Nolan Ryan autographed rookies that I want encapsulated by PSA how would I do this and get the autograph (not the card) graded. Both of the cards are signed in blue sharpie by just Ryan and I am tempted to get them signed by Koosman TTM but I don't want the cards to get "lost." Would I still send the cards through PSA Autograph Card Grading and Authentication? or would I have to send them to PSA/DNA I don't feel like spending more then I need to but they are beautiful cards.
Thanks in advance!
Jason
Thanks in advance!
Jason

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"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind." Dr. Seuss

"Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind." Dr. Seuss
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