STUMPERS CXLIX

There are two answers to this question:

What word comes next in this series?

FIRST, SECOND, THIRD, ______ ?

The first answer comes quickly to mind, but the second requires some thought. Can you come up with both answers?

HINT:
For the second answer, think outside the box - literally.

Answers:

FOURTH
HOME - 1st, 2nd, and 3rd bases and HOME plate - which is outside the batter's box