Kopech pitched four strong innings at Harbor Park against the Orioles’ Class AAA Norfolk Tides, striking out eight and walking two.
Davidson now is swinging at just 35 percent of pitches he sees, down from 48 percent in 2017. He also is swinging at fewer balls by a wide margin.
Allowing Tigers center fielder Leonys Martin to reach third base became a vital error for the White Sox on Sunday.
Rondon was signed by the White Sox in January after spending four seasons with the Tigers.