Updated at 6:08 p.m.
So general manager Mike Rizzo pulled the trigger today on a trade that brings Gorzelanny to Washington and sends minor-leaguers Michael Burgess, A.J. Morris and Graham Hicks to the Cubs, sources with knowledge of the deal have confirmed.
The trade won't become official until Gorzelanny passes a physical, expected to take place tomorrow.
Gorzelanny went 7-9 with a 4.09 ERA in 29 games (23 starts) for the Cubs last season. He owns a career 36-37 record and 4.68 ERA in six big-league seasons with the Cubs and Pirates, with whom he posted his best numbers (14-10, 3.88 ERA in 2007).
The lefty will join a Nationals rotation that currently includes veterans Livan Hernandez and Jason Marquis, promising 24-year-old Jordan Zimmermann, left-hander John Lannan, prospects Yunesky Maya and Ross Detwiler and rehabbing right-hander Chien-Ming Wang.
Gorzelanny made $800,000 last season and is arbitration-eligible for three more years. He won't be eligible for free agency until after the 2013 season.
Burgess, a sandwich pick in the 2007 draft, was at one point rated the Nationals' fourth-best prospect by Baseball America. The outfielder -- who hits for power and possesses a strong throwing arm but has struggled to hit for a high average while striking out a lot in the minors -- had fallen down the organization depth chart and this year was not listed among their top 10 prospects.
Morris, a 2009 fourth-round pick out of college who finished runner-up to Stephen Strasburg for the NCAA's Golden Spikes Award, is a hard-throwing right-hander who went 5-3 with a 3.88 ERA at Class A Potomac last season. He also wasn't listed among Baseball America's top 10 prospects in the Nats' organization.
Hicks, a left-hander selected in the fourth-round of the 2008 draft, went 1-6 with a 5.27 ERA at low-Class A Hagerstown last season.
Meanwhile, the Nationals announced this afternoon that they've come to terms with Lannan on a one-year contract, avoiding arbitration. Lannan, who was arbitration-eligible for the first time, will make $2.75 million. He made $458,000 last season
The Nats also have signed veteran infielder Alex Cora to a minor-league contract with an invitation to spring training. Cora, 35, stands a good chance of making the roster as fallback option at second base if Danny Espinosa struggles. He'll earn $900,000 if he makes the club, with up to $600,000 in performance bonuses.