Matt Williams said the Nationals will have a better idea of the weekend's rotation on Thursday.
Washington's rotation had its best weekend of the year, leading to one of the team's best series of the season.
After Max Scherzer shined Sunday, Gio Gonzalez struggled Monday, summing up an inconsistent month for the Nationals rotation.
The right-handed prospect will make a spot start on Saturday.
Tanner Roark and Taylor Jordan will be in the team's opening day rotation as a result.
In his first major league game in 20 days, the Nationals starter breezed through 3 2/3 innings and looked ready for the season.
Ross Detwiler will start the year in the bullpen, leaving Tanner Roark, Taylor Jordan and perhaps Chris Young fighting for the final rotation spot.
After the starter played catch this morning, the Nationals think he will be able to take his first turn in the rotation.
The right-hander competing for the fifth starter's spot will start against the Mets in Port St. Lucie.
How the Nationals positioned themselves to make a possible trade for a starting pitcher this winter.