8:16pm: The Diamondbacks and Nationals are not currently discussing a trade involving Parra, reports Nick Piecoro of The Arizona Republic. He says other clubs also expressed interest in the outfielder following the Kubel signing.
11:49am: The Nationals have expressed interest in Diamondbacks outfielder Gerardo Parra, reports MLB.com's Bill Ladson. GM Mike Rizzo is familiar with Parra from his time with Arizona, though it's unclear who the Nats would be willing to send the D'Backs in a trade.
Parra, 24, hit .292/.357/.427 with 15 steals and won a Gold Glove last year, but his role has been minimized due to the Jason Kubel signing. He's more than capable of manning all three outfield spots, and he won't be eligible for free agency until after 2015. The Nats have been looking for a long-term solution in center for quite some time, and Parra would certainly fit the bill.