I have sent many items TTM to players in care of their team, but can you send something to be signed to the opposing team as well. For example, if I know the Atlanta Braves are going to play in Oakland next week and I send a card to Jason Heyward of Atlanta to the Oakland Stadium, will they give it ...

That is amazing from any collectors stand point. 9 autographs on anything is outstanding but to collect that many former players is an accomplishment.