Sorting out what the Nationals are looking for in their pursuit of another starter.
Tanner Roark will likely make his final start of the season as Davey Johnson set his rotation.
The right-hander had no issues playing catch on Sunday.
Also, Ross Detwiler threw another bullpen session as he hopes to return before the season is done.
Strasburg has been dealing with minor hamstring tightness, according to Davey Johnson.
Davey Johnson, who has been wanting to get Tanner Roark a start, is again concerned with Ross Ohlendorf's endurance.
Manager Davey Johnson opted to keep the starting rotation on turn so that the top three pitchers could face the division leaders.
It will be, barring any setbacks, Stephen Strasburg, Gio Gonzalez, Jordan Zimmermann, Dan Haren and Ross Detwiler, in that order, after the all-star break.
The back of the Nationals' rotation faces many questions, but Davey Johnson isn't angling for an addition -- yet.
Chris Young's ineffectiveness and injury have left the Nationals lacking in rotation depth.