Chicago Cubs right-hander Matt Garza suffered a mild back strain on his left side while throwing batting practice to teammates Sunday and is expected to miss at least a few days of practice.
Whether it will delay his start to the regular season, team officials said they would know more about his prognosis after he is examined again Monday.
"It looks like a mild lat strain," manager Dale Sveum said. "We'll see what happens when he wakes up and see where we are a little bit more (Monday). But it's subsided, and he seems to be doing a lot better now."