[CoachPaul]

2010 interps...

SITUATION 6: R1, on second base, rounds third and runs into F5 as he attempts to field a foul fly ball. This action occurred with (a) a count of 1-1; (b) a count of 1-2; or (c) two outs. RULING: In all three instances, R1 is out for his interference. In (a), the batter returns to bat with a count of 1-2 and in (b), the batter returns to bat with a count of 1-2 as the pitch is treated as a foul for the batter’s count. In (c), B4 will lead off in his team’s next offensive half-inning. (7-4-1f)

I'm unclear of the (c) ruling because it seems to lack context. Is B4 the batter who hit the foul fly ball, or is he the next batter in the line-up? The situation does not tell us which batter is at the plate.

In my familiar lingo R1 on second base is simply referred to as R2. The batter is simply B1 for every situation because once he hits the ball he is then the BR batter/runner until he reaches safely. R1 is always the runner occupying first, R2 is the runner occupying second, and R3 is the runner occupying third.