The Mariners are set to activate outfielder Austin Jackson from the disabled list on Tuesday and option pitcher Danny Farquhar to Triple-A Tacoma, the team announced.
Jackson is on the 15-day DL with an ankle injury and has been out since the beginning of the month. Farquhar will clear space for Jackson after posting a 6.46 ERA and an 0-3 mark in 23 2/3 innings of work this season.