NL East Notes: Nationals, Lee, Papelbon, Phillies

Here's tonight's look at the NL East..

• Nationals General Manager Mike Rizzo said today that he is not actively seeking roster upgrades from the outside, tweets Jon Paul Morosi of FOX Sports.  Jayson Werth could return in the next week for the Nats, who currently sit 4.5 games back of the Braves in the NL East with a 27-25 record.
• Even though there has been speculation that the Phillies could trade Cliff Lee or Jonathan Papelbon this season, Buster Olney of ESPN told WEEI's Mut & Merloni that he doesn't see that happening.  Olney noted that owner David Montgomery is very conservative and he's also not ready to count out the Phillies.  While they have struggled, the Phillies have the luxury of getting to play plenty of games against the Mets and Marlins, whom Olney calls "two of the three worst teams in baseball".
• Phillies prospect Cesar Hernandez was recalled from Triple-A to help the club get by in the absence of Chase Utley.  The Phillies consider the 23-year-old to be a future major league player and due diligence is required as he is out of options in 2014, writes Matt Gelb of the Philadelphia Inquirer. 
• Earlier tonight, we ran down the latest on the Mets.