NL Notes: Prado, Johnson, Mattingly, Dodgers

Here are a few notes from around the National League:

• When the Diamondbacks shipped young outfielder Justin Upton to the Braves, the biggest major league piece they got back was utilityman extraordinaire Martin Prado. Now, with the two clubs in the midst of their first series of the year, Prado has reflected on the deal. As MLB.com's Mark Bowman reports, Prado says he is happy for his former club: “The thing that makes me feel real good is that you know that you got traded and the [Braves] now look better. I’m happy because all of my ex-teammates can see that they gave up something, but actually got a better team. That’s what [Braves general manager Frank Wren] was looking for. He made a good move.” Having spent his entire career in the Atlanta organization, Prado explained that the shock of the trade took more than a month to wear off.
• While Prado has hit below his career norms to start the year, one of the players he was traded for — third baseman Chris Johnson — is off to a stellar beginning of the season for Atlanta. As David O'Brien of the Atlanta Journal-Constitution tweets, Johnson says he is excited to be squaring off against his former club: "Any time you get traded, you want to come back to the place you got traded from and show them what they're missing." Johnson, along with platoon partner Juan Francisco, effectively took over for Prado as the replacement for the retired Chipper Jones. Now, Johnson is off to a career-best slash line of .324/.355/.486 over his first 110 plate appearances.
• Dodgers manager Don Mattingly may be the obvious choice to take the fall for his club's rough start, but Ken Rosenthal of FOX Sports says there is little to be gained from such a move at this time. For one thing, says Rosenthal, there is no obvious replacement who could get more production from the team. And with several major players seemingly likely to return soon from injury, Mattingly should get a while longer to try and manufacture a turnaround.
• No doubt Mattingly's job security will depend in part on the form of top offseason acquisition Zack Greinke after he recovers from a broken collarbone. Mattingly says that Greinke will return to the mound tomorrow night against the Nationals, Ken Gurnick of MLB.com reports on Twitter.
• Meanwhile, Los Angeles is continuing to undertake a major change in how it draws players into the organization, tweets Bill Shaikin of the Los Angeles Times. Shaikin says that the Dodgers have signed 46 amateur ballplayers from Latin America since the new ownership group took over last year. The previous ownership group had "all but killed" the club's Latin America presence, says Shaikin.