I sent him one just about exactly a year ago and got the same thing. So I just gonna try to get a Certified Auto card.
It is due to health reasons but I know some guys said he still signed if you sent $$.
i also gave him ten dollars to sign a baseball for me and he added hof inscription. Carl Erskine a team mate is great signing ttm and adds inscriptions. he threw 2 no hitters and also adds a card for you.