Emerson (back) will start at shortstop and bat ninth in Thursday's contest in Baltimore.
Emerson was held out of the Mariners' lineup for each of the previous three contests as be battled back spasms, but he's feeling well enough to give it a go in Thursday's series finale. The rookie infielder is sporting an elevated 30.4 percent strikeout rate in his first 19 major-league games but has gone deep four times.