Frelick (left knee discomfort) slated for MRI

MILWAUKEE -- Already missing two of their regular outfielders from last season, the Brewers saw Gold Glove Award-winning right fielder Sal Frelick exit Sunday’s 4-0 win over the Cubs with left knee discomfort.

Frelick was undergoing an MRI scan on Sunday evening to determine the extent of the injury. He grabbed at his left leg after an awkward swing in the second inning but was able to stay in the game until the top of the fourth, when Daz Cameron took over in right field. Cameron, in turn, was called up to the big leagues last weekend after starting center fielder Garrett Mitchell landed on the injured list with a strained left oblique.

And on top of that, versatile switch-hitter Blake Perkins, a Gold Glove Award finalist in center last season, has been on the IL from the start of this season after fracturing his right shin during the early days of Spring Training.

With all of those injuries to contend with, an area of depth for the Brewers has been significantly thinned. Isaac Collins and Jake Bauers have seen time in the outfield over the past week, as has Christian Yelich, who mostly served as the designated hitter in March and April as he returns from last year’s back surgery.

Frelick, who flew out to deep right field later in that second-inning at-bat on Sunday, is hitting .297 this season with a .779 OPS.

There’s also the matter of Brewers starter Freddy Peralta, whose exit after six scoreless innings and 89 pitches was due to some groin tightness that occurred while Peralta was facing Cubs leadoff hitter Ian Happ in the sixth. Peralta finished the outing with 997 career strikeouts, three shy of joining Yovani Gallardo, Ben Sheets and Teddy Higuera as the only pitchers with 1,000 career strikeouts for the Brewers.

Both Peralta and Murphy said the Brewers believe that’s a minor matter.

“He’s got good strength. The trainers checked him out,” Murphy said. “We don’t think it’s serious. But we can’t have any more injuries. We just can’t.”