Milwaukee Brewers' Jose Quintana pitches during the first inning against the St. Louis Cardinals on Sunday Milwaukee. (AP Photo/Aaron Gash)

Milwaukee Brewers pitcher José Quintana injured his calf at the end of his four-inning appearance in a 3-2 loss to the St. Louis Cardinals on Sunday.

Brewers manager Pat Murphy said after the game that the 36-year-old left-hander had left in a boot and was undergoing an MRI.

“That’s alarming, with how injured we already are in the bullpen and on the mound,” Murphy said. “It’s unfortunate.”

Murphy said the injury occurred when Quintana ended the fourth inning by retiring José Fermín on a grounder to the right side of the infield.

Fermin’s grounder bounced off first baseman Jake Bauers near the line and headed into foul territory. Bauers chased the

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