only because Marisnick is an idiot. He might have thought Lucroy was going to block the plate the way he was leaning and shuffling his feet, so he thought he would drive inside to beat the tag. Marisnick tries to curl up instead of drive through Lucroy at the very last second when Lucroy moved well inside.

To reach that line of thinking, you need to agree Marisnick is an idiot, because the back of the plate was always available. I believe Marisnick felt terrible and admitted it was a terrible baseball play.