What happens when an inexperienced right fielder playing his 10th game of the season and an inexperienced fill-in second baseman start running toward each other to catch a lazy pop fly? If you’re the Astros and there’s a 3-2 count with two outs and the bases loaded in the bottom of the ninth inning, you blow the ballgame. Right fielder Jimmy Paredes and second baseman Jake Elmore collided, allowing Russell Martin’s potential inning-ending pop in shallow right field to turn into an E-9 walk-off in the Pirates’ 5-4 victory Friday night in an interleague matchup at PNC Park. The Astros (11-31) committed three errors, including two in the ninth. Paredes [...]