9:21pm: The Nationals and Cubs have not exchanged names and a deal is unlikely, tweets Paul Sullivan of the Chicago Tribune.

8:04pm: The Cubs are engaged with discussions with the Nationals to acquire right-handed starter Jordan Zimmermann, reports Gordon Wittenmyer of the Chicago Sun-Times. Talks are serious enough that the sides have exchanged names that would be involved, with at least one top young middle infielder likely to be part of the package.

Importantly, per Wittenmyer, Chicago would want to be able to ink Zimmermann to an extension in order to pull the trigger. The Relativity Baseball client is set to hit the open market after this season. He’ll earn $16.5MM in his final year of arb eligibility, after agreeing to a back-loaded two year deal to avoid arbitration last year.

Zimmermann reportedly rejected a five-year, $85MM contract proposal from the Nats last year, and his value has only risen. Zimmermann, 28, threw to a 2.66 ERA over 199 2/3 frames in 2014, striking out 8.2 and walking a league-low 1.3 batters per nine. And that campaign brought him one year closer to free agency, reducing his risk and increasing his leverage in talks.

Zimmermann is, of course, not the only pitching option being pursued by Chicago. Wittenmyer says that Jon Lester is still a possibility, and the club is also chasing the kind of high-upside, high-risk arms it has in the past. Justin Masterson is one of those, per Wittenmyer, who says the righty could be amenable to a low-cost, one-year deal to rebuild his value. Per Chris Cotillo of MLBDailyDish.com (via Twitter), the team has had talks with Masterson, though nothing is close. Lefty Brett Anderson is another possibility, according to the Sun-Times report.

From the Nationals’ perspective, there is obvious appeal in the Cubs’ bevy of interesting, controllable middle infielders. Washington has an opening at second and has said it is interested in acquiring a shortstop option both for depth purposes and to provide an alternative to Ian Desmond, if he cannot be extended. Wittenmyer says the team feels comfortable with its staff even without Zimmermann, though I expect a free agent addition would be forthcoming if an arm is dealt.

While it is far too soon to speculate as to the pieces that might be included in a trade, the Cubs have several possible candidates that could be dangled. Starting shortstop Starlin Castro is signed to an attractive, yet pricey contract. And then there are heralded youngsters Javier Baez, Arismendy Alcantara, and Addison Russell.