"Leaving Early" (pitch) to pull up socks

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I had similar situation in playoff games this year.

R1 at first had left lead foot on the bag and right foot was behind the bag in foul territory.

R1 decided to switch feet by first moving left foot behind the bag and then placing right foot on the bag as the lead foot.

Clearly not trying to "take a lead", just a dumb mistake.

I 'warned' the base coach after the inning, asking her to explain to her player to please not put me in the position where I have to call a nit-picky out.