Rob Carr/Getty Images

After Manager Davey Johnson expressed concern yesterday about Ross Detwiler’s status for his next start, Detwiler played catch this morning at Citi Field and said he believes he will start in his usual place Wednesday.

“I don’t have any question about it,” Detwiler said.

Detwiler felt soreness in the left side of his lower back after he pitched five innings Friday night. The stiffness was not related to the right oblique strain that sidelined Detwiler for nearly a month earlier this season.

Johnson had said Ross Ohlendorf would have started in Detwiler’s place Wednesday if Detwiler had been unable to pitch. The Nationals even called up reliever Erik Davis to enable them to keep Ohlendorf in reserve. Detwiler still has to throw a side session Monday, but his status no longer seems to be an issue. Detwiler is 2-6 with a 4.13 ERA this year.

Before Detwiler played catch, Dan Haren threw a bullpen session for the first time since he went on the disabled list a week ago. Haren received a cortisone shot Monday to treat inflammation in his left shoulder, which he described as a minor ailment.

Haren is eligible to come off the disabled list July 8. For now, the Nationals have replaced him with rookie right-handed Taylor Jordan, who began the year at Class A Potomac. Yesterday, Jordan came from Class AA Harrisburg and allowed the Mets one earned run over 4 1/3 innings.