Well, perhaps for being on the ballot for starters, but all players are eligible to make the game. But....
Last year, I made a post around the middle of May when the ballots were released. Jerry Owens was on the ballot. He had not played in a single major league game and was not on the active roster. Carlos Quentin, who was leading the league in HR, was not on the ballot.
So, I really don't know how they decide who's on the ballot.

