Cardinals' Steven Matz: Shut down multiple weeks

Matz (back) suffered a setback during his most recent rehab start Sunday at Double-A Springfield and will be shut down from throwing for the next two weeks, Katie Woo of The Athletic reports.

Matz reported soreness in his back during the third start of his rehab assignment. Though the veteran southpaw looked to be on the cusp of a return from the 15-day injured list, the setback will result in Matz having to restart his throwing program once the two-week shutdown period is over. According to Woo, the Cardinals estimate that Matz could return within 4-to-6 weeks in a best-case scenario, meaning that he can be ruled out through the All-Star break.