Sonny Gray could miss Opening Day because of a mild right hamstring strain sustained in his latest spring training outing for the St. Louis Cardinals.

Gray had been slated to start at the Los Angeles Dodgers on March 28.

"If it's in the cards for me to still do that, then obviously I'm going to do everything in my power to make that happen," Gray said.

The right-hander left his start Monday against the Washington Nationals after 20 pitches. The Cardinals initially said Gray had tightness in his hamstring, and an MRI revealed the strain.