Hurdle challenged the call -- which was overturned following a review of merely 50 seconds. Replays showed the diving Polanco easily get his long left arm on the bag before first baseman Paul Goldschmidt could apply the tag.
Polanco wound up stealing second base but was stranded. The Pirates led, 2-0, going to the bottom of the third.
Tom Singer is a reporter for MLB.com and writes an MLBlog Change for a Nickel. He can also be found on Twitter @Tom_Singer. This story was not subject to the approval of Major League Baseball or its clubs.