Josh Donaldson has not been placed on the injured list and the Twins describe the third baseman's right calf tightness as day-to-day.
But the Twins aren't sure if their prized free-agent acquisition will be back in action sooner or later.
"I think this is one of those situations where we're going to treat it today," manager Rocco Baldelli said Saturday. "We're going to keep an eye on him in the training room getting his stuff done, and then we're going to know a lot more in the next 24 to 48 hours and know when he can get back out there."
Donaldson's history with calf injuries doesn't provide encouraging clues.
During his injury-plagued 2018 with the Blue Jays, he missed nearly a month because of a sore shoulder. But a left calf strain sidelined him from May 29 to Sept. 10. He was traded from Toronto to Cleveland during his recovery and returned in time to appear in the playoffs.
In 2017, Donaldson landed on the injured list because of a right calf strain — the same leg that's giving him trouble now — and missed 38 games.
Perhaps his familiarity with the injury prompted him to leave Friday's game before he injured himself even worse.
"He didn't seem to have much visually any issue moving around," Baldelli said. "He was out there in the field, made a play or two out there, kind of looked OK coming off the field. But he knew that it tightened up. It's not something we're going to push. When he's back and ready to go a hundred percent, we'll have him back out there."