Matusz has a strained muscle in his lower back, an injury significant enough that he would miss time if this were the regular season, Roch Kubatko of MASN reports.

EDGE Analysis

Matusz will have to sit out for a few weeks before returning to camp, so him being ready for Opening Day is now in doubt. Any time missed for the 29-year-old would lead to more appearances for guys like Mychal Givens, along with a better shot for T.J. McFarland to make the bullpen as a situational left-hander.