ST. LOUIS — Initial tests were positive on Carlos Martinez’ problematic shoulder. So maybe at least the St. Louis Cardinals had something to smile about.

After lasting just seven pitches in a 4-3 loss to the Milwaukee Brewers Friday night, the 24-year-old right-hander said there wasn’t a lot of pain but added he had some weakness. The Cardinals have scheduled an MRI for Saturday.

“I’m not too concerned about it,” Martinez said through an interpreter. “But I’m going to wait till tomorrow and see what happens.”

Khris Davis homered off Trevor Rosenthal leading off the ninth inning for Milwaukee, atoning for a base-running gaffe earlier. Davis thought there were two outs instead of one when he kept running on a routine fly ball and was easily doubled off second in the fourth.

“I completely blanked out,” Davis said. “I can’t afford to make those mistakes.”