The ball wouldn't teleport, it would disappear. It would be stuck in time and would therefore no longer exist in the future, so basically what you would see is this:

1. You throw ball.
2. Ball disappears.
3. You continue traveling at your speed.

Let's say that you throw the ball at 5:00PM EST on the dot on June 1, 2010, at 5:01 you would not see it because it would still be at 5:00, stuck.