Stephen Strasburg. (Photo by John McDonnell/The Washington Post)

Ross Detwiler will make his first start of the spring on Monday against the New York Yankees in Tampa and Stephen Strasburg will make his spring debut start on Tuesday against the Atlanta Braves in Lake Buena Vista, according to Manager Matt Williams. Jayson Werth, the last Nationals regular yet to play this spring, will start on Sunday against the Miami Marlins.

Williams declined to name Wednesday’s starter, but it would presumably be Gio Gonzalez, the only starter yet to be scheduled to pitch in a game. Gonzalez is slated to throw a bullpen session on Sunday, which would give him two full days off before Wednesday.

Tanner Roark, who is competing for the last spot in the starting rotation along with Taylor Jordan and Detwiler, is scheduled to pitch on Monday after Detwiler. Williams is piggybacking starting pitchers because there are so many in camp.

While the other Nationals regulars were scheduled to appear in the first two games of spring, Werth was the one yet to play. Williams said Werth was on a normal schedule and he was easing him into the spring schedule.

Ryan Mattheus, who has been dealing with chest discomfort, said he is feeling better and will see the team doctor on Saturday. Mattheus had originally thought he would be checked by the doctor on Friday. The right-handed reliever said he hopes to be cleared to resume throwing and could even play catch later in the day.