With the Arizona leading the Pirates, 2-0, in the ninth inning Tuesday at PNC Park, the Diamondbacks' Gerardo Parra challenged the arm of right fielder Josh Harrison after Ender Inciarte's single. Harrison wasn't having it. He handled the rolling ball and retired Parra -- trying to score from second -- with a perfect throw home to catcher Russell Martin. That kept the Diamondbacks' lead at two runs, just enough to let the Pirates win in walk-off fashion when they scored three in the ninth.