https://jferg2210.wixsite.com/ftdcards/post/cardinals-have-signed-japanese-superstar-tetsuto-yamada
This is the same website I listed, but as I stated, he must be listed as a signed MLB player on a Baseball Reference. Here is our adopted rule on international players.
Section F- International Signees
Item AX F-1.0
International signees (including those in the July signing period) are subject to the normal in-season FA rules. See Section B- Free Agency, Sub-Section 1- FA Bidding above.
Item AX F-2.0
International player are not eligible to be signed until they have a page on BB Reference along with another source confirming their signing. Fantrax will not add the player unless their BB Reference page is submitted.