The Case for Edwin Jackson's playoff roster spot: Edwin Jackson is the Nationals' 5th starter but has performed at a very high level. Jackson has a 2.92 ERA in the 2017 season. The 1-4 pitchers of the Nats rotation is pretty much a lock for the postseason: Scherzer, Strasburg, Gonzalez, Roark. But with how well Jackson has performed, there could be a possibility of him pitching in the bullpen during October. Do you think he should be on the playoff roster?