The Washington Nationals, even after acquiring left-hander Gio Gonzalez and signing him to a five-year, $42 million extension, might not be done adjusting their starting rotation.
The team is aggressively shopping left-hander John Lannan, according to major-league sources. Trading Lannan would clear payroll, potentially enabling the Nats to sign one of the top remaining free-agent right-handers, either Roy Oswalt or Edwin Jackson.
Oswalt, 34, and Jackson, 28, both are entertaining one-year offers, but Oswalt prefers to play for the Texas Rangers or St. Louis Cardinals, sources say.
Jackson, on the other hand, is represented by Scott Boras, with whom the Nationals have worked well in the past. The Nats also tried to acquire Jackson at the 2010 non-waiver deadline.
Lannan, 27, lost his arbitration case with the Nationals but became the team's highest-paid pitcher for 2012 on Thursday, receiving $5 million. The pitcher had asked for $5.7 million after earning $2.75 million last sea...