Just because I think it's an interesting comparison. Travis Wood has 3.3 WAR over 208.2 IP in his career, with a 3.75 FIP and a 4.30 xFIP (not shocking for a flyball pitcher in GABP). He's under control for 5 more years. Gio Gonzalez over the last two years has averaged 3.35 WAR in 201.1 IP, with an FIP of 3.71 and xFIP of 3.89. He's under control for 4 more years. The Nationals just gave up a huge haul of prospects to get their guy. The Cubs gave up one year of an elite setup guy, but will also be receiving two additional prospects.