Home plate umpire Marvin Hudson called a strike on the first offering from pitcher Adam Warren on Harper and the Nationals right fielder appeared to disagree. That generated an argument about Harper getting back into the batter’s box.
Harper demonstrated with his left cleat that he was digging in to take the next pitch. Hudson ejected him shortly after he made the gesture.
You can see the video here -- it was quite an ump show.
Hudson must have felt like the fans in attendance at Nationals Park paid to come see him, rather than the early frontrunner for National League MVP. Michael Taylor replaced Harper in Washington’s batting order.