As of Saturday afternoon, the Arizona Diamondbacks had a record of 50-50, just 5.5 games out of a possible Wild Card berth in the National League.
Despite the fact that they're still within reach, much of the talk surrounding the D-Backs has been about players who they might unload, rather than purchase.
Shortstop Stephen Drew has been mentioned in various rumors as being a possible target for other contending teams (per Buster Olney), as has outfielder Justin Upton. However, the hoopla surrounding Upton seems to have quieted considerably.
If in fact the D-Backs keep both Upton and Drew, then it could be assumed that they feel they could make a run this season. If that's the case, San Diego Padres third baseman Chase Headley would be an excellent suggestion.
There are only two problems—trading within the division is always difficult, and the Padres and Diamondbacks have strained relations dating back a while. Current Padres part-owner Jeff Moorad was once the D-Backs' owner, and current D-Backs general manager Kevin Towers manned the same position with the Padres for many years.
Still, Headley would be a great option, both short and long-term. With Ryan Roberts now with the Tampa Bay Rays, Headley would fill a need. For now, Willie Bloomquist and Ryan Wheeler will split time at the hot corner for Arizona, but neither are considered everyday players at this point.