Combining two threads into one, in essence.
I have no idea how to research such a thing broadly.
My guess was that our namesake, Mr. Horn himself, would be the winner, but he actually played 46 games in his call-up year, so not him. (Side note: Sam Horn's wikipedia page does not mention this site. Seems odd.)
Similarly both X and Ben10 were August call-ups not September.
Has anyone ever been a notable contributor who was only called up after 9/1?
I have no idea how to research such a thing broadly.
My guess was that our namesake, Mr. Horn himself, would be the winner, but he actually played 46 games in his call-up year, so not him. (Side note: Sam Horn's wikipedia page does not mention this site. Seems odd.)
Similarly both X and Ben10 were August call-ups not September.
Has anyone ever been a notable contributor who was only called up after 9/1?