Right-handed power hitters are in short supply on the trade market.
That could change, however, if the Arizona Diamondbacks fall from contention.
At that point, the D-backs would consider offers for right fielder Justin Upton, according to major-league sources.
The team currently is preparing for all trade possibilities -- buying, selling and veteran-for-veteran deals that would improve the club, sources said.
Arizona general manager Kevin Towers historically has been willing to discuss any player on his roster. However, a trade of Upton would become realistic only if the D-backs became outright sellers, which is hardly certain given the unsettled state of the NL West.
The division-leading Dodgers are without three injured regulars -- center fielder Matt Kemp, right fielder Andre Ethier and shortstop Dee Gordon. The second-place Giants are concerned about two of their starting pitchers, right-hander Tim Lincecum and lefty Barry Zito.
The D-Backs entered Friday night's play sev...