Davey Johnson has some things to sort out before opening day. (Greg Fiume - GETTY IMAGES) The countdown to has reached single digits. A week from Sunday, pitchers and catchers will officially report for the season. The most anticipated Washington Nationals Opening Day since 2005, which will take place among the dead-brown April ivy at Wrigley Field, is less than two months away. It’s getting closer.

The Nationals have fewer questions concerning their roster heading into spring training than perhaps any other time since baseball returned to D.C., but the spring will still be stocked with story lines. Where does Bryce Harper start? What to do with all those starting pitchers? Who the heck is playing center field?

As an initial attempt to sort them out, here’s our first and too-early educated guess at the Nationals’ Opening Day roster.

(John McDonnell - The Washington Post) The Nationals’ “Take Back Our Park” initiative took an unexpected political turn today as Sen. Bob Casey (D-Penn.), via Twitter, stood against the Nationals’ plan to limit ticket sales to only Maryland, Virginia and D.C. residents for the team’s series in May against the Phillies.

“I’m calling on the Nationals to reverse course on a reported plan to block Phillies fans from buying tickets to games at Nationals Park,” Casey wrote in consecutive tweets Thursday afternoon. “Phillies have some of the best fans in the world. They shouldn’t be left out in the cold because the Nats want a stronger home field adv.”

(Greg Fiume - GETTY IMAGES) It’s been a week since the Nationals signed Edwin Jackson, a deal that seemed to blanket John Lannan’s future here in uncertainty. The Nationals have seven or eight viable starters competing for five spots, and based on contract and service time considerations, Lannan became widely regarded as the Nationals’ most expendable (read: tradeable) starter.

 But Lannan said he reacted to Thursday’s deal without any of those sentiments racing through his head. Shortly after he finished a workout this afternoon, Lannan said in a phone conversation that he welcomed Jackson’s addition, and that the deal had no effect on his outlook for the 2012 season.

 “I think Edwin is a great pitcher,” Lannan said. “It’s going to increase an already competitive environment. It’s going to help the rotation. I think it’s a great move for the team.”

(Carlos Osorio - AP) For all the connections between the Nationals and super-agent Scott Boras, the most unique came most recently.

Last week, Nationals media relations manager Bill Gluvna resigned in order to take a job working for Boras Corporation., where he’ll serve in a variety of roles, including marketing and public relations. He will be based in Washington but work with all of Boras’s clients.

The Nationals have a large stable of them, including Stephen Strasburg, Edwin Jackson, Jayson Werth, Danny Espinosa and Rick Ankiel in the majors along with high-profile prospects Bryce Harper, Brian Goodwin, Alex Meyer and Anthony Rendon in the minors.

The Nationals signed corner infielder and outfielder Mark Teahen to a minor-league deal, the team announced this afternoon. Teahan, 30, will compete for a spot on the Nationals’ bench and could give them needed depth at Class AAA Syracuse.

In his seven-year career, Teahen has hit .264/.327/.409, mostly with the Kansas City Royals. Teahen struggled mightily last season with the Chicago White Sox and Toronto Blue Jays, hitting .200/.273/.300 with four home runs in 177 plate appearances.

In the three seasons preceding his disastrous 2011, Teahen compiled a serviceable .721 OPS. In 2006, his best season, Teahen slugged .517 and got on base at a .357 clip.