Yes, Boston is build for 3 run homers. They don't steal many bases.

If the runner go, the batter is suppose to hit where the player covering the base is standing. In this case he hit the ball too much up centre.

As for Beckett pitching 3 games I don't think we will see it. They didn't do it in the ALCS and we will not see it in the World Series. Maybe a small relief appearance (game 7) but I would be surprise if Beckett starts 3 games.

They will probably go with:

Beckett, Scilling, Dice K, Wakefield, Beckett, Scilling and Dice K (game 7) with Beckett in relief if needed.