"He wasn't his usual self," Johnson said. "His back was really bothering him. He had to go in after he couldn't take ground balls [between innings]. There was a situation made to order [where] I could get him out of there, and hopefully he'll be able to play tomorrow."
• According to the Elias Sports Bureau, Haren has a 2.16 ERA since returning from the disabled list July 8, which is eighth best in the NL since July 1.
Haren's ERA of 6.15 through the end of June was the third worst in the Majors, ahead of Clayton Richard (7.01) and Jeff Francis (6.58). Both rankings are among pitchers with a minimum of 50 innings pitched over both periods.
• Roger Bernadina -- who was released by the Nationals on Monday -- has signed with the Philadelphia Phillies, and he was in uniform for tonight's game against the Rockies at Citizens Bank Park.
Bernadina, who signed with the Montreal Expos when he was 17 years old in 2001, had been the organization's longest-tenured player.
He hit .178 (27-for-152) with two home runs and six RBIs in 85 games for the Nationals this season.
Manny Randhawa is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.