After being given Wednesday off, Jayson Werth is back in the Nationals' lineup, leading off tonight's series finale against the Cubs. Jordan Zimmermann is taking the mound, as the Nats shoot for their fifth straight victory. Zimmermann, however, hasn't had the decisions going his way of late. He's been stuck on nine wins since Aug. 9, going 0-2 with a 7.91 ERA over his last four starts. Perhaps he gets on track tonight. For the Nationals: RF Jayson Werth CF Bryce Harper 3B Ryan Zimmerman 1B Adam LaRoche LF Michael Morse SS Ian Desmond 2B Danny Espinosa C Kurt Suzuki P Jordan Zimmermann