I picked Pro Player, but actually it was originally Pro Player Park. I can't remember if they changed it to Stadium after that first season or sometime during that first season. Pro Player Park was the worst followed by Pro Player Stadium.
It don't think it was ever officially "christened" Pro Player Park. They talked about it when the announcement was made, but it never got there. They changed it to Pro Player stadium before the first game was played in it, I think.
It was a matter of days. I'm not sure if that counts as official.