Jackson will start in right field and bat fifth in Sunday's game against the Cubs.
Jackson has been put to work since being called up from Triple-A Norfolk on Thursday, as he'll pick up his third consecutive start Sunday. The 25-year-old has produced three base knocks in his first six at-bats with Baltimore, but he's nonetheless expected to see his playing time take a hit once Tyler O'Neill moves past an illness and Ryan Mountcastle (hamstring) is activated from the injured list, which could happen later this week.