The Arizona Diamondbacks are still shopping their two-time All-Star outfielder Justin Upton, and talks have picked up with the San Diego Padres on a potential NL West swap, FoxSports.com's Ken Rosenthal reports.

Sources told Rosenthal that the Diamondbacks and Padres are talking about a trade that would send Upton to San Diego for Padre breakout star Chase Headley. Headley, a third baseman, won the Gold Glove and Silver Slugger for his position in the National League and led the league with 115 RBI in 2012.

Rosenthal also reports that while the Upton-for-Headley deal is a possibility, Arizona is continuing to discuss its outfielder with other teams. The Texas Rangers and Seattle Mariners are among other potential destinations for Upton.

Upton batted .280 last season with 17 home runs and 67 RBI. He is a year removed from a Silver Slugger and a fourth-place finish in league MVP voting.

Rosenthal says the Diamondbacks might also be fielding offers for outfielder Jason Kubel.