Prospects cant be in the game until they are on the active MLB Roster, prospects are never in the game but you can DL updated rosters ALL THE TIME. And as for Tatis he was just announced today the game was finished and packed weeks ago. Wait till Vlad gets over his fat belly problems and makes MLB then he will be on an updated roster. Or like I said within the 1st few weeks all team roster will be updated with all AAA, and AA players through a 3rd party (since officially they xabt do it because of MLB rights until a player makes the 25 man active MLB roster.