Backs up all throws to 3rd base, and is ready to be a back-up man on any rundown between 3rd and the plate.
If the catcher throws to 3rd base after faking to 2nd, the pitcher must break to the plate to back it up in case of a rundown.
As the catcher receives the ball, the LF must back up any throw to 3rd and help out in a rundown.
Backs up any throw to the 2nd baseman in the baseline, then proceeds to 1st as a back-up in a rundown.
In the ensuing rundown, the defenders have to keep alert for a signal from the 3rd baseman.
Backs up any throw to 3rd, and is ready to get involved on any rundown between 3rd and the plate.
If a rundown occurs, the pitcher must back up the man at 1st.
If a rundown occurs between 3rd and the plate, the pitcher must back up the plate.
If it isn't, he throws to the pitcher's glove (at shoulder height), then stays alert for a possible rundown or a play at the plate.