The White Sox informed Jankowski on Wednesday that he'll be included on the Opening Day roster, Scott Merkin of MLB.com reports.
Jankowski didn't sign with the White Sox until mid-March, but he made enough of an impression during his brief time in camp to clinch a roster spot. The veteran outfielder could see some starts against right-handed pitching if Mike Tauchman (hamstring) needs to miss time to begin the season.