Adam Wainwright will likely miss "several weeks" after suffering a groin strain during the World Baseball Classic, Oliver Marmol said Thursday.

Wainwright, 41, was scheduled to be the St. Louis Cardinals' starter on Opening Day for the seventh time.

The injury happened during a weight room workout Tuesday with Team USA.

"We'll continue to evaluate over the next few days but no timetable at the moment," Marmol said. "There is a spot in the rotation now open, and we're going to have to sit down and make sure that we're not missing anything that goes into that."