It was extra innings. A catcher who had never caught was behind the plate. Martinez needed to find a way to get out of the inning. So he picked off one runner, then another, then another. Side retired.
How Tippy Martinez once picked off the side

It was extra innings. A catcher who had never caught was behind the plate. Martinez needed to find a way to get out of the inning. So he picked off one runner, then another, then another. Side retired.