In other words, the C
position will be used by the base umpire in all situations that are not
"no runners" or "runner on first only".
With a runner on 2nd base only,
3rd base only, 1st & 2nd, 1st & 3rd, 2nd & 3rd and with bases loaded, the base umpire will position himself/herself two to three steps behind
and two to three steps to the left of the shortstop when the shortstop
is in his/her normal position. If the shortstop is crowding towards or
playing exceptionally close to the 2nd base bag the base umpire should
take a position to the right of the shortstop but no further than
halfway between the 2nd and 3rd base bags (about 20 to 30 feet from the
2nd base bag). When taking this alternate position the base umpire must
be able to have an unobstructed view of home plate and must be careful
that he/she is not in the left fielders line of sight to home plate.
The umpire's body should be squared to the front edge of home plate. The umpire should be in a good set position watching the pitcher for any violations, following the pitch to the batter and be ready to help the home plate umpire if the need arises.
The umpires should make sure that they are not too deep or shaded too far towards either base when they assume this position. Being too deep or shaded too far either way could place the umpire at a poor angle or distance to be able to react and make a good, well educated call on the play. If the umpire is positioned as described in the previous paragraph, he/she will be in a good starting position for steals at 3rd base as well as other plays to the infield including runners leaving before the ball reaches the batter.