BALTIMORE -- Red Sox first baseman Mike Carp left Sunday's 6-3 loss to the Orioles with right hamstring tightness after hitting a double in the seventh inning.
"He felt cramping go up first base, but I don't think it's a pull," manager John Farrell said. "Strength testing in the training appeared to be not far off from normal. Hopefully with the day off [Monday], he'll be available on Tuesday. Again, it wasn't a pull. It was more of a cramping situation, probably because of the humidity and the heat over the past couple of days."
Carp started the previous two games after regular first baseman Mike Napoli was forced to go back to Boston with dizziness and nausea.
"Hopefully, it's just a cramp," Carp said. "It's been pretty humid the last couple of days. I don't feel too concerned about it. I have the rest of the night off and tomorrow. Almost two full days until we play again, so I'm pretty confident I'll be back out there Tuesday."
Carp has been one of Boston's most productive hitters despite limited at-bats. He is second on the club with eight home runs.
Shane Victorino pinch-ran for Carp and stayed in the game in right field. Daniel Nava, who started in right, moved to first base.
Red Sox making plans if Buchholz goes on DL
BALTIMORE -- As right-hander Clay Buchholz continues to experience soreness in his neck, Red Sox manager John Farrell has been forced to make adjustments to his rotation.
Farrell said Felix Doubront will start one game of a doubleheader Tuesday against Tampa Bay. Alfredo Aceves will be recalled from Triple-A Pawtucket to start the other. The Red Sox also recalled reliever Pedro Beato from Triple-A Pawtucket on Sunday and optioned Rubby De La Rosa, who could still start Saturday against Detroit if Buchholz has to go on the disabled list.
"As we stated the other day, we didn't want Rubby to get too far away from the progress he is making in that role," Farrell said. "Given our situation with Clay, and the doubleheader on Tuesday, we're just trying to keep as many options open."
Buchholz is scheduled to throw in the bullpen Tuesday, and from there, the club will decide the next course of action.
"We're hopeful it's Tuesday, but as Clay is also aware that if it's not by Tuesday, then we'll have to make a roster spot," Farrell said.
Pedroia out of lineup for first time; Victorino rests
BALTIMORE -- Red Sox second baseman Dustin Pedroia and right fielder Shane Victorino were out of the lineup Sunday against the Orioles to get some rest.
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Pedroia was involved in a controversial play Saturday when he appeared to strike out swinging, but the home-plate umpire ruled he got a piece of the ball. He singled to center on the next pitch, and Mike Carp then tied the game with a homer to right, snapping Boston's 18-inning scoreless streak.
After the game, Pedroia also wasn't sure he got a piece of the ball.
"It was a break for us," Pedroia said. "I just said, 'I thought I fouled that.' He said, 'Foul ball.' I thought I hit something. It was probably the ground. I don't know."
Pedroia also committed his first error of the season. His last error had come Aug. 29, a span of 97 games.
The Red Sox do not play Monday before a scheduled doubleheader against Tampa Bay on Tuesday. It was the first game Pedroia has missed this season.
"[Pedroia] was, I think, a little more willing at the end of yesterday to take today and tomorrow to give him two days to recover," manager John Farrell said. "Shane, as well, was more of a planned off-day."
Jose Iglesias got his first start at second base and Daniel Nava was in right.
Farrell hopeful Napoli will rejoin lineup Tuesday
BALTIMORE -- Red Sox first baseman Mike Napoli traveled back to Boston to determine why he is experiencing dizziness and nausea, but manager John Farrell hoped the first baseman would be back with the club Tuesday.
Napoli's health issues have been characterized by the club as a "general illness." Farrell said the Sox are optimistic Napoli will not have to go on the disabled list.
Mike Carp has produced in place of Napoli and his home run Saturday against the Orioles snapped the Red Sox's 18-inning scoreless streak. Carp, who entered Sunday's game with just 103 at-bats, was tied for second on the club with Napoli, Will Middlebrooks and Jarrod Saltalamacchia with eight home runs.
"We're fortunate we have a very good bench, and it speaks to the depth of the team," Farrell said. "Mike Carp has been outstanding."
Todd Karpovich is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.