[umpjim]

Originally Posted by Rita C

Here's JEA

7.03 Two runners may not occupy a base, but if; while the ball is alive, two runners are touching a base, the following runner shall be out when tagged. The preceding runner is entitled to the base.

Cross References: 7.01

Historical Notes: The 1920 Official Rules explained the proper enforcement when two runners ended up on the same base. (Circa 1920)

In case a runner is being run down between bases and the following runner occupies the same base the first runner has left, the second man cannot be put out while holding said base. If the first runner, however, returns safely to the base he left, and both runners are then occupying the same base, the second runner is the man out, if touched with the ball.

The 1950 recodification established the exact wording used in today's rule.

Professional Interpretation: The preceding runner is entitled to the base when two runners occupy the same base; however, if a force play has been initiated by the batter's becoming a runner, the preceding runner loses all legal rights to that base and may be retired by being tagged while still occupying the base.

On force plays, the following runner is entitled to the base.

Situations: One out, runners on second and third. The batter hits a ground ball to the third baseman who traps the runner off third. A rundown follows. The agile runner is able to get back to third safely, however, the runner from second is also standing on third base, both runners are tagged. Who is declared out?
RULING: The original runner still has the rights to third base. The runner from second shall be called out when tagged.

Thanks Rita, if this doesn't work I don't know what will.