Arizona Diamondbacks trade deadline preview with Bob Nightengale

<p>The trade deadline is coming, and the Arizona Diamondbacks are sitting in a National League Wild Card spot with a chance to get back to the postseason. USA Today's MLB insider Bob Nightengale joins Alex Weiner and Dave Burns to preview the deadline for the D-backs and their fellow playoff contenders. Then, Alex and Burnsy pick three players they would target at the deadline and discuss the closer role.&nbsp;</p>