"He was throwing the other day, and when he extended, he really felt it a little bit," Leyland said. "So they just shut him down a little bit to make sure."
It's been a tough season for the 25-year-old right-hander so far. After claiming the Tigers' last bullpen spot and making the Opening Day roster, Marte suffered the injury before even playing in a game.
When Marte eventually returns, it's not guaranteed his spot will still be available, according to Leyland. But the skipper will weigh the options and make a "fair" decision based on performance.
"You hate to say it, but sometimes it's the luck of the draw," Leyland said. "Somebody got hurt and somebody else come up here and did a heck of a job. And all of a sudden there's not room for that guy. Other times you say, 'You know what, we still need that guy.'
"I don't know how it's going to play out. I can't answer that. But he did make the team out of Spring Training, and I don't think it's fair to say because he was injured, he's out of the picture, because he's not."