Center fielder Denard Span left Sunday's game after six innings because of a right shoulder injury, further dampening the Twins' 7-3 loss to the Rays at Target Field.
Span rushed in on a sinking fly ball hit by Tampa Bay's Jeff Keppinger. He fell to his knees, then rolled over on his shoulder as the ball bounced free. Span crawled on his knees to retrieve the ball and threw to the infield, then stayed down a few moments in obvious pain. He finished the inning but did not return for the seventh.
Darin Mastroianni replaced him in the lineup and played right field, with Ben Revere sliding over from right to center.
"Went and got an X-ray. X-rays were negative," Twins manager Ron Gardenhire said. "We'll just call him day-to-day. Pretty sore in his collarbone/shoulder area or whatever it is."
Span was not available to speak with the media after the game but did post a response on his Twitter account around 5 p.m.
"I'm doing fine," he tweeted. "I wanna thank everyone for their concerns."
Revere, a natural center fielder batting .314, can replace Span in the field and at the top of the batting order. Mastroianni or Ryan Doumit can play right as Span recovers.
Plouffe nears return
Trevor Plouffe made two nice plays at third base Saturday but went 0-for-4 with two strikeouts in his first rehabilitation game with Class AAA Rochester.
He went 0-for-4 again Sunday, but indications remained that he would rejoin the Twins.
A final decision was expected to be made Monday morning.
"He'll play [Sunday] and he will be back [Monday], if everything goes good," Gardenhire said earlier.
Plouffe hasn't played since July 20 in Kansas City because of bruised right thumb.
Once Plouffe is ready, the Twins will have to make room on the major league roster. All signs point to the Twins demoting infielder Tsuyoshi Nishioka, who hasn't played in three games after three mostly awful games in Cleveland.
Capps may throw soon
Reliever Matt Capps, who last pitched July 16, will have an MRI exam around lunchtime Monday to make sure all the inflammation that has interrupteded his season is gone.
The righthander hopes to get the go-ahead to resume a throwing program.
"If all goes good, I'm going to start playing catch on Wednesday," Capps said. "Then from my understanding every other day for a week, then every day, then off a mound."
It's been a frustrating year for Capps, who signed a one-year, $4.75 million contract with a $6 million club option in 2013.
He wanted to prove he could close games after a poor 2011. He's 1-4 with a 3.81 ERA and 14 saves in 16 opportunities.
But he hopes to return to action sometime in September and finish the season strong.