Gilbert will serve as the White Sox's opening pitcher for Sunday's game in Philadelphia, Brooke Fletcher of Chicago Sports Network reports.
In an effort to counter a Philadelphia offense with three key lefty hitters in Kyle Schwarber, Bryce Harper and Brandon Marsh, the White Sox will go with a left-handed opener for the second straight day. Gilbert is likely to work the first inning or two before giving way to right-hander David Sandlin, who is set to work in bulk relief after getting the start in his first two MLB appearances.