Trevor Plouffe felt some discomfort on his right side in recent days but it wasn't limiting him, so he thought nothing of it.
"I hadn't felt it swinging or running or throwing," he said.
That all changed Sunday after the Twins third baseman drew a 10th-inning walk. He was stranded at first to end the inning and began to jog to his position at third base in the top of the 11th when it hit him.
"As I was jogging, I just felt it kind of grab me," he said. "It was one of those freak things."
Plouffe left the game and was diagnosed with an intercostal muscle strain.
The intercostal muscles are located between the ribs. Plouffe is listed as day-to-day, but he could land on the disabled list if there isn't sufficient improvement over the next couple of days. Last year, Twins relievers Brian Duensing and Tim Stauffer landed on the DL because of intercostal strains.
The timing is awful, as the Twins have won their past three games while Plouffe has gotten hot at the plate, going 8-for-12 in the three games with three doubles, a home run and four RBI.
"We're going to try to give him a little bit of [time] and see how he responds over the next day or two," manager Paul Molitor said, "before we decide if we are going to have to do anything."