Lannan, 27, led the Nationals in wins in 2011, posting a 10-13 record and a 3.70 ERA. He was also the team's Opening Day pitcher in 2009 and '10. At Triple-A Syracuse this year, he went 6-9 with a 4.89 ERA in 18 starts. His recall was based on a new rule that allows clubs to designate a 26th member of their active roster for a doubleheader.
After Edwin Jackson takes the mound for the Nats in the first game, Lannan will be pitching in his first game with the Nationals since Sept. 27, 2011, when he earned a no-decision, pitching six innings and allowing two runs on three hits of an eventual 3-2 loss to the Marlins in Florida. His last start in Nationals Park also came against the Marlins on Sept. 16, 2011, when he picked up the loss after surrendering three runs on eight hits in a 3-0 loss.
Lannan requested a trade shortly before Opening Day 2012 after it became apparent that he would not make the big league roster. But with Stephen Strasburg pitching under an innings limit this season, the Nats need another pitcher on tap once their ace is shut down.
"I expect him to throw well," manager Davey Johnson said. "He pitched good for me last year, won the most games for us. He's a competitor. I talked to him, he's looking forward to the chance to coming up here and helping us. He's had a tough row to hoe and I think he's handled it the right way."
Nady, meanwhile, batted .157 three home runs and six RBIs in 40 games with the Nats this year. He was placed on the disabled list on June 24 with right wrist tendinitis.